lindsay

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Questions

The following questions were asked by visitors named lindsay.

Hi I have 2 questions I hope someone can help me :) 1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface wh...

1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface where the conditions are 22 C and 1.00 atm? is this co...

factor: (x-1)^1/2 - x(x-1)^-1/2 ive tried multiple different ways to firgure it out, but i cant seem to get too far in my work, i just don't know where to start.

I was doing a spectroscopy problem, and on the NMR spectrum a peak at around 4.4 with 2 H says "exchanges with D2O". What does this suggest?

Solve: A jar contains 45mL of corn syrup whose mass is 41.4g and 90mL of glycerin whose mass is 75.4g. Which liquid is on top? SHOW MY WORK? im not sure how to do that what math would i show?

Find the coordinates of the center and the radius of a circle with and equation of: a. x^2 + 2root7x +7 + (Y-root 11)^2 =11 b. x^2 -12x + 84 =-y^2 + 16y

Compare and contrast the American and french revolution

What would be a better conclusion to my paper? Depression, anxiety, and other mental illnesses are worldwide to be thought of diseases that are “just in the head”. Even if that is true the patients know they are sick and they need help by taking medicatio...

You want to estimate 5.25-3.3 why would using front-end estimation tell you more about the answer than rounding? ______________________________________________________________________________________________________________________________________________...

why would using front-end estimation tell you more about the answer than rounding?

Between what 2 planets does the asteroid belt lie?

What is the temperature of an ideal gas whose molecules have an average translational kinetic energy of 3.90 10-20 J? K

what is the length of an equilateral triangle when the area is 45 meters square?

A survey was conducted to measure the number of hours per week adults spend on home computers. In the survey, the number of hours was normally distributed, with a mean of 8 hours and a standard deviation of 1 hour. A survey participant is randomly selecte...

Given that the graph of f(x) passes through the point (2,5) and that the slope of its tangent line at (x, f(x))is 3x+5, what is f(3) ?

Given f"(x)=-8sin3x and f'(0)=-1 and f(0)=-6. Find f(pi/5). i got stuck with f(pi/f) f"(x)=-8sin3x f'(x)=8cos3x+c f'(0)=8cos3(0)+c=-1 c=-9 f'(x)=8cos3x-9 f(x)=-8sin3x-9x+c f(0)=-8sin3(0)-9(0)+c=-6 c=-6 f(pi/5)-8sin3(pi/5)-9(pi/5)-6. so am i right?

the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+2dt, and find f"(x). my answer was: f'(x)=x^3+x^2+2 f"(x)=x^4/4 + 2x^3/3 + 2x it said its wrong.

given triangle ABC with AB=7cm, BC=8cm and AC=9cm calculate 1. the size of the largest angle 2. the area of the triangle

a ship travels 8km due north then 7km on a bearing of 070 degrees 1. draw a diagram to represent the information 2. calculate the distance and bearing of the ship from its starting point

express 3 cos x -2 sin x in th eform R cos (x + a) and hence write down the maximum and minimum values of 3 cos x - 2 sin x.

state the amplitude, period and phase shift of the function y=tan (20-80 degrees)

Find all the angles between 0 degrees and 360 degrees which satisfy the equations a. 8 cos x sin x = sin x b. 5 tan^2 y + 5 tan y = 2 sec^2 y.

two pieces of wire stretched from the top, M of a vertical pole to the points L and N on the horizontal ground. the angle of depression of L from N =65 degrees. N is on the opposite side of the pole(from left)at an angle of depression of 72 degrees from M...

Hal walked from point A to point B due north east from a distance of 20m. He immediately changed direction and walked 50m from B to C on a bearing of 110 degrees. 1. calculate the distance AC 2. Find the bearing of C from A

Solve the equation 6 cos x^2+sin x=4 if 0 is less than or equal to x is less than or equal to pi

Find the general solution for f(x) = 27 tan^2 x-9=0

show that sin 2theta/1-cos 2 theta = cot theta

a closed box of uniform thickness is made of wood 1cm thick. Its extenal dimensions are 6cm and 5 cm by 4 cm. Find the a. volume of the wood used in making the box. b. the capacity of the box, given that the cover is full length and full width c. The inte...

the diagonal VY of a cuboid =root(26.25)cm, the length of a side ZY = 4cm and the height of a sideUZ =25cm for the cuboid. Find the width of the width UV.

Write an equation for each circle if the coordiantes of the center and length of the radius are a. center(-1,-5) radius = 2 units b. center(0,3) radius = 7 units c. center(-9,7) radius = 1/2 units

Find the coordiantes of the center and the radius of each circle a. (x+root5)^2 + y^2 -8y =9

solve the equation: 4 tan^2 x + 12 sec x +1 =0, for 0 degrees is less than or equal to x is less than or equal to 360 degrees.

Given that tan A = 2 tan B (B is the symbol for Beta) show that tan (A-B) = sin 2B/3- cos2 Beta.

Find all the angles between 0 degrees and 360 degrees which will satisf y the equation: 5tan^2 y +5 tan y = 2 sec^2 y

Find all the solutions of x,for 0 is less than x is less than 2 pi a. Sin(x + pi/4 + sin(x - pi/4)= -1 b. Sin(1/3 x+5) = 1/2

In the triangle ABC, the sides AB and BC have lengths 7cm and 8cm respectively, and angle B is obtuse. the area of the triangle is 14 root 3 cm^2. Find a.The size of angle B b. The length of AC

I need help in understanding how to identify which identity to use. using this question as an example. Show that tan theta (sin theta+cot theta cos theata)all over cos theta = sec^2 theta. Please explain.

R =(cos0 -sin0) (sin0 -cos0) State the matrix R for 0=120 degrees NB 0 represents theta

The points A=(1,1) B=(3,4) connects to point C (3,1). a. Find the length of AB b. The gradient and equation of line AB

The towns A and B are on the circle of latitude 24 degrees N.The longitude of A is 108degrees E and longitude B is 75 degrees E. a. Calculate the radius of the circle of latitude 24 degrees N. b.The shortest distance between A and B measured along the cir...

Given that P=(2,10) (5,-3) a. Evaluate the inverse P^-1, of P b. use a matrix method to solve x(2,5)+ y(1,-3) =(7,1)

a metal ball with a charge of 5.4x10^8 electrons is touched to another metal ball so that all the excess electrons are shared equally. What is the final cahrge on the first ball?

a square with side length 2.0 cm has a charge of -1.0x10^-6C at every corner. What is the magnitude and direction of the electric force on each charge? What is the force on a fifth charge placed in the centre of this square? Does the sign of the fifth cha...

to start a nuclear fusion reaction, two hydrogen atoms of charge 1.602x10^-19 and mass 1.67x10^-27kg must be fired at each other. If each particle has an initial velocity of 2.7x10^6m/s when released, what is their minimum seperation?

solve: n squared + 5n = 84 for n?

simplify the following giving your answer with a rational denominator, 2 root3 - root 3/ 2 + root three.

Solve the equation 3^2x - 12 x 3^x + 27 = 0

Solve the inequality 2x^2<12-5x

What ia A inverse if A = (3 -2) (3 2)

How many photons are produced in a laser pulse of 0.324 J at 631 nm?

How to solve 13 is 10 percent of what number?

I need to sketch the graph of t(x)=2x^2 +3x > or equal to 10x-x^2. How do I work out the points to plot on the graph?

The function f:x =2x+1/x-3 and g:x =1-x/2 a. For what value of x is 'f' undefined? b. Find 'f' inverse and hence solve f(x) =1/3. c.Show that fg(x) -gh(x).

Find the range of values of 'c' for which g(x)= -3x^2-4x-c has complex roots

Given that h(x) =x+1/x-2 and g(x)=4-x. Find hg(x) and find gh(x)

Given that h(x)=x+1/x-2 and g(x) =4-x. Find h(g)(x) and find g(h)(x). P.S. Thanks for the correction Steve.

If f(x)=2x+1/x-3 and g(x)=1-x/2 Show that f(g)(x)=g(f)(x)

Calculat the absolute value of: 4-{x-3}=0 PS. The brackets are supposed to be the straight lines for the absolute symbols.

3. Write the function R that models the total number of components that reenter the atmosphere around the earth each year.

Current price is $100, current salesbare 5000 units. For every increase in price of $1, sales decrease by 20 units. Find optimum revenue.

Can you explain how I find the values so I can plot a graph of T=(25 ln24/ln) -(25/ln2) ln M

A sector AOB of a circle, centre O, radius r cm, where the acute angle AOB is theta radians. Given that the perimeter of the sector is 14 cm and that the area of the sector is 10 cm^2, evaluate r and theta.

a species of orchid is being studied. The population 'p' at time 't' years after the study started is assumed to be p = 2800ae^0.2t/1 + ae^0.2t where 'a' is a constant. Given tnat there were 300 orchids when the study started. a. show that a =0.12 b. use...

A sequence is generated by the recurrence relation Ur+1 = 1/Ur -3. Given that U2 = U1 find the possible of U1

This is a matrix question but I can't get a single bracket so I will use two. (a b)(5 1) =(12 -2) (3 0)(-2 4) (15 3) Find the values of a and b.

This is a matrix question. R is the matrix (3r 1) (s 2s) 1. State, in terms of s and r the determinant of R 2. If r=1/3 and s=4 determine the inverse of R 3.State the pair of r and s not including 0, which would make the matrix R a singular matrix

find the exact value of [sec(-30 degrees)- cot 120 degrees]/1-cosec^2(45 degrees) Find the exact value of [sin^2(355 degrees) + cos^2 (355 degrees)]/ tan^2 (30 degrees)

The 9th term of an AP is 8 and the 4th term is 20. Find the first term and the common difference.

Triangle XYZ with vertices X(3,-1) Y(7,-3)Z(3,-5) undergoes an enlargement represented by the mapping: x

Triangle XYZ with vertices X(3,-1) Y(7,-3)Z(3,-5) undergoes an enlargement represented by the mapping: (x)--(-0.5 0)(x) +(-3) (y)--( 0 -0.5)(y) +(4) Evaluate: 1. The vertices of the image of triangle XYZ. 2. The centre of enlargement PS. The small bracket...

Simplify cos Theta/4 cos theta/4 - sin theta/4 sin theta/4.

Given the function y= 4cos(2x+90degrees)-3, Find the value of y when x =30 degrees.

Triangle DEF is such that DF=8cm,EF=5.5cm and its area is 11 root2 cm^2. Find angle EFD.

Solve the equation 8 cos^2 X -2 =0 given that 180< or equal to X <or equal to 360 degrees.

If the bearing fron H to G is 098 degrees, what is the bearing of G from H

Prove that Sin x + tan x / 1+cosx =tan x

Find the exact value of 1. tan 75 degrees 2. Cos 15 degrees 3. Sin 105 degrees

The following statement defines a relation R in the natural numbers N. state whether or not each relation is symmetric 1. x is less than or equal to y 2. x+y =10

The equation kx^2 -2x-7=0 has two real and identical roots, find the value of k.

solve the following absolute value question /4x + 5/ =25

What is the negation of p and q?

solve the following inequality /3x + 12/ >/ 21 PS >/ means greater than or equal to.

0.06 2/3 into a fraction

A floor measures 10m by 5m is to be covered with flooring boards measuring 1m 20cm. How many flooring boards would be needed to cover this section.

Given that x = 2log t is a solution of the equation10^(2x+1) -7(10^x) -26 =0. Find t

Solve 3 log x = 1 + log (4x+5)/ log 2

Solve 4^y -7(2^y) = 8

Given that 2 log base2 (x+15) - log base2 x = 6 1.Show that x^2 -34x +225 = 0 2. Hence or otherwise solve the equation 2 log base 2 (x+15) - log base 2 x =6

a 40 year building programme for new houses began in 1951(year 1) and finished in 1990 year (40). The number of houses built each year form an A.P. With the first term 'a' and the common difference 'd'. Given that 2400 new houses were built in 1960 and 60...

Answers

The following answers were posted by visitors named lindsay.

if you roll a fair number cube 30 times ,how many would you expect to roll a number that is a multipule of 3.

jim, i am sorry to get your hopes up that i know this answer. i have no clue. what grade r u in?

Mars and Jupiter

i worked the problem out using that formula but i kept getting the wrong answer (23.3-18)/18=0.294

I put for my answer is A

i mean i got stuck with f(pi/5)

The function should read y = tan(2 theta - 180 degrees).

g(x)= -3x^2 g(f(x))= -3(x^2-4)^2 -6(x^2-4)(2x) -6x^2-24 (2x) -12x^3-48x -12x(x^2+4) f(g(x))= (-3x^2)^2-4 2(-3x^2)(-6x)-4 -6x^2(-6x)-4 36x^3-4 4(9x^3-1)

Hi Reiny, I did not get any parentheses with the question. I got it the way I typed it. Thanks.

2. Based on the function D, what would be the total amount of nonfunctional components in 2014?let 1993 be represented by 0

i don't think it is right but 72

they need to be creative with ideas

you are dumb if you do not know this answer

If someone says "I think" that is guessing, not sure

8.00 mg/L *24.0L? Not even an option in the multiple-choice. Thanks for what? it's not even the answer!