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2010
April

Questions Asked on April 12, 2010

What is the vertex of a parabola? How do you determine the vertex of the parabola?
1. 20 answers
2. asked by GGIFT
3. 8,813 views
1. The radius of the circumscribed circle of the triangle ABC is 15 cm. Given that B is a 49-degree angle, find the length of
1. 1 answer
2. asked by sally K
3. 5,522 views
How fast does water flow from a hole at the bottom of a very wide, 3.7 m deep storage tank filled with water? Ignore viscosity.
1. 1 answer
2. asked by Anonymous
3. 5,435 views
A 16.0 m uniform ladder weighing 480 N rests against a frictionless wall. The ladder makes a 61.0° angle with the horizontal.(a
1. 1 answer
2. asked by phys
3. 4,908 views
1. Triangle ABC has a 63.0-degree angle at B, and side AC is 13.6 cm long. What is the diameter of the circle circumscribed
1. 2 answers
2. asked by Esi
3. 4,778 views
Devon’s bike has wheels that are 27 inches in diameter. After the front wheel picks up a tack, Devon rolls another 100 feet
1. 2 answers
2. asked by johny g12
3. 4,676 views
if 3/5 of a number exceeds its 2/7 by 44 ,find the number
1. 8 answers
2. asked by Anonymous
3. 4,675 views
Dana takes a sheet of paper, cuts a 120-degree circular sector from it, then rolls it upand tapes the straight edges together to
1. 1 answer
2. asked by hodna
3. 4,603 views
The lengths QR, RP, and PQ in triangle PQR are often denoted p, q, and r, respectively.What do the formulas 1/2 pq sinR and 1/2
1. 3 answers
2. asked by sarah
3. 3,993 views
The perimeter of a triangle, its area, and the radius of the circle inscribed in the triangle are related in an interesting way.
1. 1 answer
2. asked by sarah A
3. 3,911 views
A triangle has a 56-degree angle, formed by a 10-inch side and an x-inch side. Given that the area of the triangle is 18 square
1. 1 answer
2. asked by yadlay
3. 3,873 views
what do you call it when somebody spends 20 years in the 24th row of a theater
1. 6 answers
2. asked by brooks
3. 3,564 views
If two angles are supplementary, then their sines are equal. Explain why. What about the cosines of supplementary angles? If you
1. 3 answers
2. asked by sarah
3. 3,413 views
A firm uses a single plant with costs C= 160 +16Q +.1Q2 and faces the price equation P= 96 – .4Q.a) Find the firm’s
1. 3 answers
2. asked by J
3. 2,838 views
Find all solutions w between 0 and 360, inclusive:(a) cosw = cos(−340) (b) cosw = sin 20 (c) sinw = cos(−10) (d) sin w < −
1. 2 answers
2. asked by sally
3. 2,772 views
A counterclockwise quarter-turn Q about the origin is applied to the point (x, y). What are the coordinates of the image point?
1. 1 answer
2. asked by yadlay
3. 2,640 views
Two observers who are 5 km apart simultaneously sight a small airplane flying between them. One observer measures a 51.0-degree
1. 1 answer
2. asked by Ghanny
3. 2,499 views
Find the third side of a triangle in which a 4.00-inch side and a 6.00-inch side are known to make a 56.0-degree angle. Round
1. 1 answer
2. asked by hodna
3. 2,447 views
If a triangle has sides of lengths a and b, which make a C-degree angle, then the lengthof the side opposite C is c, where c2 =
1. 2 answers
2. asked by hodna
3. 2,440 views
Barbara knows that she will need to buy a new car in 4 years. The car will cost $15,000 by then. How much should she invest now
1. 4 answers
2. asked by Dexter
3. 2,386 views
What graph is traced by the equation (x, y) = (5sin 12t , 6−5 cos 12t)?Think of another equation that will produce the same
1. 1 answer
2. asked by sally
3. 2,334 views
The Ka values of H3PO4 are shown below.Ka1 7.5 10-3 Ka2 6.2 10-8 Ka3 4.8 10-13 What is the pH of a 0.19 M solution of NaH2PO4?
1. 3 answers
2. asked by Chem Confused
3. 1,973 views
Attendance records at a school show the number of days each student was absent during the year. The days absent for each student
1. 1 answer
2. asked by KiKi
3. 1,908 views
Write down the Ksp expression for Ag2CrO4. If the solubility of Ag2CrO4 is 0.0216 g/L, calculate the value of Ksp
1. 1 answer
2. asked by Chenny
3. 1,802 views
The base radius of a cone is 6 inches, and the cone is 8 inches tall. To the nearest square inch, what is the area of the
1. 1 answer
2. asked by Ghanny
3. 1,779 views
An isosceles triangle has two sides of length w that make a 2á-degree angle. Write down two different formulas for the area of
1. 1 answer
2. asked by Lydia
3. 1,742 views
A gardener measures the tallest of his prize-winning sunflowers and finds that the height is 60 in. The sunflower was 52 in.
1. 4 answers
2. asked by jim
3. 1,716 views
The cost principle requires that when assets are acquired, they be recorded at
1. 1 answer
2. asked by Jack
3. 1,710 views
Given a vector u, the familiar absolute-value notation |u| is often used for its magnitude.Thus the expressions u•u and |u|2
1. 1 answer
2. asked by sarah A
3. 1,680 views
Our cycle of normal breathing takes place every 5 seconds. Velocity of air flow, y, measured in liters per second, after x
1. 1 answer
2. asked by Anonymous
3. 1,640 views
A father pulls his young daughter on a sled with a constant velocity on a level surface through a distance of 10 m, as
1. 2 answers
2. asked by Anonymous
3. 1,607 views
What is the length of the vector [5 cos è, 5 sinè]? If the vector [5,0] is rotated 36 degrees in the counter clockwise
1. 1 answer
2. asked by sally
3. 1,589 views
Find an equation of a line that is tangent to y=2sinx and whose slope is a maximum
1. 1 answer
2. asked by Anonymous
3. 1,532 views
a 500.0 g sample of h2o2 conatins 31.50% h2o2 by mass find the mass of water in the solution
1. 1 answer
2. asked by lauren
3. 1,482 views
Chlorine gas can be produced in the laboratory by adding concentrated hydrochloric acid to manganese(IV) oxide in the following
1. 2 answers
2. asked by Court
3. 1,435 views
For any two numbers a and b, the product of a−b times itself is equal to a2−2ab+b2.Does this familiar algebraic result hold
1. 3 answers
2. asked by sarah A
3. 1,393 views
GENERAL GUIDELINESThis assignment is a written project of approximately 8-10 pages (not including bibliography). The project
1. 3 answers
2. asked by sara
3. 1,365 views
In a certain chemical reaction 1.00 gram of product is produced in 15 minutes when the reaction is carried out at 20oC. Assuming
1. 2 answers
2. asked by chris
3. 1,363 views
Write down the Ksp expression for CaF2. If the molar solubility of CaF2 at 35℃ is 1.24×10^(-3)mol/dm3, calculate the value of
1. 1 answer
2. asked by Chenny
3. 1,359 views
Chlorine gas can be produced in the laboratory by adding concentrated hydrochloric acid to manganese(IV) oxide in the following
1. 0 answers
2. asked by Courtney
3. 1,316 views
_______g of MnSO4 H2O are needed to prepare a solution of 100.00mL of 0.100 M MnSO4.Thank You
1. 3 answers
2. asked by ChEm
3. 1,312 views
f(x) = 4e^-1x +13x +5 at (0,9)1. All steps for finding the first derivative of the function are clearly and accurately shown. 2.
1. 1 answer
2. asked by sarah
3. 1,312 views
(A) 2 students are sharing a loaf of bread. Student A eats half of the loaf, then student B eats half of what remains, then
1. 4 answers
2. asked by Harold
3. 1,301 views
Find a Counterexample to show that the conjecture is false.Conjecture: Any number that is divisible by 6 is also divisible by
1. 1 answer
2. asked by Court
3. 1,291 views
Triangle PEA has a 20-degree angle at P and a 120-degree angle at E, and the length of side EA is 6 inches. Find the lengths of
1. 1 answer
2. asked by Beatrice
3. 1,284 views
Building from the project you created in Unit 1,Identify all of the costs involved in the project. Label the costs either direct
1. 0 answers
2. asked by Anonymous
3. 1,283 views
a battery with and emf of 12V and an internal resistance of 0.5 ohms, is connected in series to a resistor of 5.0 ohms. what is
1. 2 answers
2. asked by mandy
3. 1,276 views
What is the length of the vector[5 cos theta, 5 sin theta]? If the vector [5,0] is rotated 36 degrees in the counter clockwise
1. 2 answers
2. asked by Sally
3. 1,246 views
Draw the unit circle and a first-quadrant ray from the origin that makes an angle è with the positive x-axis. Let B be the
1. 0 answers
2. asked by yadlay
3. 1,219 views
Inside the cylinders of a diesel engine, the mixture of fuel and air is compressed to about 1/20 of its original volume.
1. 1 answer
2. asked by Andrea
3. 1,190 views
1. The radius of the circumscribed circle of the triangle ABC is 15 cm. Given that B is a 49-degree angle, find the length of
1. 0 answers
2. asked by Sally K
3. 1,182 views
In an effort to help Japan recover from the devastating effects of the 1929 depression, Japanese military leaders in the
1. 2 answers
2. asked by Greiye
3. 1,178 views
How did U.S. manufacturers become vulnerable to offshore outsourcing
1. 2 answers
2. asked by Anonymous
3. 1,161 views
Construct a Gantt chart and network diagram for a project you are or will be involved in. Choose a project of sufficient depth
1. 1 answer
2. asked by Tank
3. 1,156 views
"Evaluate the following indefinite integrals:"S" (3x^2 -2)/(x^3 - 2x + 1)^3 dx" We're practicing the substitution rule, and I
1. 1 answer
2. asked by Stuck
3. 1,142 views
What's the net present value (NPV) of this replacement project?The old equipment has a book value of $200,000 (year 0) and a
1. 1 answer
2. asked by Herb
3. 1,128 views
A .600 g sample of CaCO3 is disolve in concentrated HCl (12M). the solution was diluted to 250 mL in a volumetric flask to
1. 6 answers
2. asked by pem
3. 1,114 views
Two observers who are 5 km apart simultaneously sight a small airplane flying between them. One observer measures a 51.0-degree
1. 1 answer
2. asked by Ghanny
3. 1,113 views
A shape can set off from its surroundings using changes in:a. Value [lightness or darkness] b. color [chroma or hue] c. texture
1. 1 answer
2. asked by rmz
3. 1,094 views
Two kinds of shapes that are created when an object is placed in a picture plane are:a. right and left b. high and low c. light
1. 2 answers
2. asked by rmz
3. 1,092 views
Our cycle of normal breathing takes place every 5 seconds. Velocity of air flow, y, measured in liters per second, after x
1. 2 answers
2. asked by Anonymous
3. 1,083 views
What mass of acetylene, C2H2, will be produced for the reaction of 90.g of calcium carbide, CaC2, with water in the following
1. 0 answers
2. asked by Courtney
3. 1,078 views
Methanol (CH4O0, which is used as a fuel in high performance racing cars, burns in the presence of )2 to form CO2 and H2O. The
1. 0 answers
2. asked by cathy
3. 1,067 views
an acid base titration is conducted in which 20 ml of LiOH is added to 10ml of .200M HBr to reach the equivilance point. what is
1. 1 answer
2. asked by Elf
3. 1,054 views
Let u = [3,−4] and v = [8, 15]. Calculate the four numbers |u|, |v|, |u − v|, and |u| − |v|. Do the same with the vectors
1. 2 answers
2. asked by sarah B
3. 1,049 views
The market for Good X can be depicted with the following demand and supply equations:Demand: P = 50 – 1/2Q Supply: P = 1/3Q
1. 1 answer
2. asked by Dina
3. 1,047 views
express the given repeating decimal0.159159159 as a fraction
1. 2 answers
2. asked by lili
3. 1,043 views
I asked this question previously, but I was told you were unable to get the answer with rational numbers. I asked my teacher,
1. 2 answers
2. asked by Mica
3. 1,041 views
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles
1. 0 answers
2. asked by Lydia
3. 1,013 views
Write the balanced ionic equations for the following precipitations and complex forming reactions:a) AgNO3 solution + copper
1. 1 answer
2. asked by Chenny
3. 998 views
You are in closed room somehwere on Earth. You have no compas, gyroscope or GPS. No TV, phone, FAX, emil, computer, internet, or
1. 4 answers
2. asked by DL
3. 997 views
an air bubble is released at the bottom of a lake where the temperature is 4 celsius and the pressure is 3.40 atm. if the bubble
1. 2 answers
2. asked by cc
3. 980 views
A 50.0 mL sample of 0.42 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.40 M NaOH. Calculate the pH at the
1. 3 answers
2. asked by Chem Confused
3. 973 views
Zinc metal reacts with hydrochloric acid (HCl) according to the equation:Zn(s)+HCl(aq)=ZnCl2(aq)=H2(g) How many grams of H2 are
1. 2 answers
2. asked by Duaine
3. 964 views
Is there an equation used to fond remaining pressureWhen CS2 at partial pressure 1930 torr reacts with H2 at partial pressure
1. 2 answers
2. asked by Tokey
3. 955 views
Bunyan Lumber LLC: Calculate when the company should harvest the timberBunyan Lumber, LLC, harvests timber and delivers logs to
1. 1 answer
2. asked by Anonymous
3. 932 views
How do you tell which end of a polar bond is positive or negative? My book says that a molecule such as Hf has a center of
1. 2 answers
2. asked by Emma
3. 924 views
If the bases of an isosceles trapezoid have lengths of 22 and 29, what is the length of the median? If necessary, round your
1. 4 answers
2. asked by jboy
3. 920 views
what mass of sodium acetate should be dissolved in 1.00L of acetic acid, 0.150M concentration, in order to produce a buffer with
1. 1 answer
2. asked by Reen
3. 917 views
Enter the Net Ionic Equation including phases, for the reaction of AgNO3 and Ba(OH)2.
1. 2 answers
2. asked by Brittany
3. 912 views
I'm doing an essay on Roosevelt's New Deal, and i'm supposed to do it from a present perspective, keeping in mind the recent
1. 1 answer
2. asked by nat
3. 909 views
An early board game of ancient Egypt in which players moved their counters around the squares, please answer before 9:00 am
1. 2 answers
2. asked by Natalie
3. 907 views
In art the term scale refers to:a. range of colors used b. the texture of a surface c. the weight of a sculpture d. relative
1. 4 answers
2. asked by rmz
3. 898 views
1. Triangle ABC has a 63.0-degree angle at B, and side AC is 13.6 cm long. What is the diameter of the circle circumscribed
1. 1 answer
2. asked by Esi
3. 896 views
A Giffin good is not correctly described by which of the following?A)A Giffin good must be an inferior good. B)A Giffin good
1. 0 answers
2. asked by Dina
3. 889 views
In a certain chemical reaction 1.00 gram of product is produced in 15 minutes when the reaction is carried out at 20oC. Assuming
1. 1 answer
2. asked by chris
3. 883 views
What synonym could you use to replace horrendous?
1. 2 answers
2. asked by India
3. 882 views
factor by grouping x^3-5x^2+5x-25
1. 1 answer
2. asked by Lo
3. 875 views
Standard deviation for the following setsand compare the differences. first 7 #'s 57 61 57 57 58 57 61 second 7#'s 61 52 69 64
1. 0 answers
2. asked by Dannette Fulcher
3. 862 views
Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s.
1. 1 answer
2. asked by Maggie
3. 858 views
if two cones are similar and the ratio between the lengths of the radii is 7:3, what is the ratio of their surface areas
1. 1 answer
2. asked by viri
3. 852 views
If two vectors u and v fit the equation (u − v) • (u − v) = u•u+v•v, how must these vectors u and v be related? What
1. 2 answers
2. asked by sally
3. 825 views
What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J?K
1. 1 answer
2. asked by lindsay
3. 813 views
A certain FM radio station broadcasts jazz music at a frequency of 90.7 MHz. (Radio waves are electromagnetic)?Find the waves
1. 1 answer
2. asked by phill
3. 812 views
A race car is driven around a circular track at a constant speed of 180mph. If the diameter is 1/2 mile, what is the angular
1. 1 answer
2. asked by Anonymous
3. 806 views
Farmers¡¦ Revolt„h Create a bullet point list of the factors that led to political stalemate and the subsequent farmers¡¦
1. 2 answers
2. asked by Donna
3. 804 views
The base radius of a cone is 6 inches, and the cone is 8 inches tall. To the nearest square inch, what is the area of the
1. 3 answers
2. asked by Ghanny
3. 792 views
Devon’s bike has wheels that are 27 inches in diameter. After the front wheel picks up a tack, Devon rolls another 100 feet
1. 0 answers
2. asked by Johny G12
3. 788 views
T he weights (in pounds) of a group of high school students are listedbelow in a stem-and-leaf plot.
1. 1 answer
2. asked by Anonymous
3. 785 views
The terminal side of theta is in Quadrant III and lies on the line y = 2x. What are the 6 trig functions?
1. 2 answers
2. asked by Becky
3. 785 views

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