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Find the exact value of the expression:tan−1(tan(−120651/47π)) I just don't know how to find the exact value. Any
1. 3 answers
2. 649 views
Evaluate the following expression. Your answer must be in exact form: for example, type pi/6 for π6 or DNE if the expression is
1. 4 answers
2. 1,743 views
An isosceles triangle has an area of 24 yd², and the angle between the two equal sides is 166°. Find the length of the two
1. 1 answer
2. 635 views
A Wheel of radius 14in. is rotating 0.5 rad/sec. What is the linear speed v, the angular speed in RPM ( rev per min), and the
1. 2 answers
2. 4,677 views
a bicycle with 24inch diameter wheels is traveling at 15mi/hr.a) Find the angular speed of the wheels in rad/min. b)How many
1. 2 answers
2. 19,218 views
A company runs food service concessions for sporting events throughout the country. Their marketing research department chose a
1. 1 answer
2. 2,241 views
Gravel is being dumped from a conveyor belt at a rate of 30 ft3/min, and its coarseness is such that it forms a pile in the
1. 1 answer
2. 2,282 views
Please tell me if i got this right... Fill in the blanks...“The __Sum__ of the length of the hypotenuse of a __Right__
1. 1 answer
2. 339 views
What is 5/9, 15/16, 1/4, and 9/10 put in order from smallest to largest?
1. 1 answer
2. 510 views
An open-topped rectangular box is to be constructed from a 24 inch by 36 inch piece of cardboard by cuttingout squares of equal
1. 1 answer
2. 2,128 views
Nikki ate 1/4 of a pizza. The pizza had more than 4 slices. Which fraction describes how much of the pizza Nikki could have
1. 2 answers
2. 1,365 views
The inflation rate in the united states in 2014 was about 1.3%. If prices go up by 1.3% per year, how long will it take for them
1. 1 answer
2. 504 views
A concrete path of width 1m and thickness 10cm is to be placed around you pool. Find the number of cubic meters of ready mixed
1. 0 answers
2. 586 views
Please help! I have 30 ml bottle of 5% hydrocholric acid. Ned to dillute to make 200 ml of .01 M hydrocholric acid. I don't know
1. 1 answer
2. 410 views
5% hydrocholric acid in 30ml (1 fl oz) - how to dillute to make 200 ml of .01 M?I think i need to first fin concentration solute
1. 1 answer
2. 486 views
An airplane travels with a speed of 145 mph in calm air. the wind is blowing with a velocity of 23 mph from N72degreesE. If the
1. 1 answer
2. 709 views
A projectile on level ground is launched with a certain speed vi and has a downrange distance of vx what is its new downrange
1. 0 answers
2. 499 views
A man is on his apartment balcony 25m above ground level. He has a fire hose aimed directly at another man who is a ground
1. 0 answers
2. 768 views
identify the conditions on x that make the following statement true, if they can be made true at all:9^x > 1 9^x < 1 9^x = 1 9^x
1. 3 answers
2. 527 views
a child mass m slides down a slide 5 m high. the child speed at the bottom of the slide is 3 meters per second. what is the
1. 1 answer
2. 1,607 views
You have 100 feet of fencing with which to construct a circular pen. what is the area can you enclose?
1. 1 answer
2. 823 views
An open box is to be made from a flat piece of material 9 inches long and 6 inches wide by cutting equal squares of length x
1. 1 answer
2. 978 views
I was able to come up with the answers through trial and error, and the answer for the charge +q makes sense, but I don't
1. 0 answers
2. 544 views
If y = 2x^3 - 4x and dx/dt = 4, find dy/dt when x = 1.Please show me how to solve this problem with steps.
1. 2 answers
2. 1,405 views
On Sept. 1, 2012, Parsons Company purchased $84,000 10 year 7% government bonds at 100 plus accrued interest. The semi-annual
1. 0 answers
2. 848 views
So I corrected my errors but am still confused. Should I convert torr to ATM or KPa to get R?
1. 1 answer
2. 508 views
Oxygen gas can be generated by heating KClO3 in the presence of a catalyst.KClO3 KCl + O2 (unbalanced) What volume of O2 gas
1. 4 answers
2. 2,108 views
Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States,
1. 1 answer
2. 681 views
Find the derivative of 1/(1+(x-3)^2)Steps would be appreciated.
1. 1 answer
2. 594 views
In an electricity experiment, a 0.900g plastic ball is suspended on a 50.0cm long string and given an electric charge. A charged
1. 1 answer
2. 1,008 views
Jane has a bike with a 22-inch rear wheel. The wheel sprocket is 3 inches in diameter and the pedal sprocket is 4 inches in
1. 3 answers
2. 768 views
What is the formula for finding the central angle of a sector when given the radius and arc length?
1. 1 answer
2. 1,503 views
A 1.2 lead ball is launched off a cliff top at 16 m/sDetermine the balls kinetic energy at position P. Ignore friction
1. 0 answers
2. 531 views
Not sure how to complete this chemical reaction:Li + Fe(NO3)3 --->
1. 5 answers
2. 2,379 views
Can someone explain how to conduct a Chi-test in depth?
1. 0 answers
2. 398 views
Mr Kim mix cement and sand to make a mixture.He uses 2 pails of cement for every 5 pails of sand.(A) Find the ratio of the
1. 1 answer
2. 730 views
Find the total force necessary to give a rocket of mass 25,000 slugs an acceleration of 28.0 ft/s2.
1. 1 answer
2. 482 views
Is there a way to find out some information about an e-mail address without actually sending a message? As in, is it still in
1. 1 answer
2. 611 views
A sprinter starts from rest and accelerates for 5s. He then travels at a constant velocity for 10s. Finally he slows down to a
1. 1 answer
2. 657 views
How do I convert a distance time graph into a velocity time graph. I am given a distance time graph with three curves but i am
1. 2 answers
2. 646 views
Heather and Jerry are standing on a bridge 43m above a river. Heather throws a rock straight down with a speed of 12m/s . Jerry,
1. 0 answers
2. 865 views
In wuthering heights, what are the most influential forces in the shaping of a childs values and behaviour? Parents, guardians,
1. 1 answer
2. 469 views
Is respiratory control more sensitive to small changes in arterial PO2 or in arterial PCO2
1. 1 answer
2. 414 views
What role, according to Dessner, does irony play in the story A&P by John Updikes? What levels of irony are at work in the
1. 1 answer
2. 623 views
Using Hess’s Law with the following data:N2(g) + O2(g) = 2NO(g) Del(H) = 180.7kj 2NO(g) + O2(g) = 2NO2(g) Del(H)= -113.1kj
1. 1 answer
2. 1,204 views
Calculate the value of the standard enthalpy change for each of the following reactions (standard enthalpy for Na2SO4(s) is
1. 1 answer
2. 610 views
Using standard enthalpies information, calculate the standard enthalpy change for this reaction.a)(thermite reaction) 2Al(s) +
1. 1 answer
2. 1,359 views
Given the Data:N2(g) + O2g) = 2NO(g) delta H = 180.7kj, 2NO(g) + O2(g) = 2NO2(g) delta H = 0113.1kj, 2N2O(g) = 1N2(g) + O2(g)
1. 1 answer
2. 1,225 views
A solution of hydrogen peroxide, H2O2, is titrated with potassium permanganate, KMnO4, according to the following equation:
1. 2 answers
2. 1,065 views
What is the degree of the monomial?6x^5
1. 5 answers
2. 4,022 views
1.How are alternating and direct current different?2.Who invented direct current? 3.Who invented alternating current? 4.What are
1. 0 answers
2. 626 views
If an object has a work of 300J and a displacement of 20m, how would I determine the net force?
1. 1 answer
2. 366 views
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude
1. 1 answer
2. 1,405 views
A satellite is given a boost of 540 MJ of energy to move it from its initial orbit at an altitude of 150 km to a higher altitude
1. 0 answers
2. 608 views
A snowmobile, with a mass of 530 kg, applied a force of 410 N backwards on the snow.a) What force is responsible for the
1. 2 answers
2. 1,848 views
A ball on the end of a rope is moving in a vertical circle near the surface of the earth. Point A F T is at the top of the
1. 1 answer
2. 2,684 views
A 3 kg cat sitting on a 1.5 kg piece of cardboard on a frozen lake wants to jump to shore without touching the ice. If there is
1. 2 answers
2. 849 views
The density of ethanoic anhydride is 1.092 g/mL. Use this value, and the amount that you used in the laboratory to show that
1. 0 answers
2. 558 views
Which implicit element of the analogy in these lines is analogous to "family worship"? Breakfast over, Aunt Polly had family
1. 3 answers
2. 614 views
5.00 mL of 2.00x10^-3M Fe(NO3)3 is mixed with 4.03 mL of 2.00x10^-3M NaSCN and 1.08 mL of 0.1M HNO3, for a total volume of 10.11
1. 0 answers
2. 562 views
A standard solution with a FeSCN2+ concentration of 1.55x10^-4M has a percent transmittance (%T) of 18.8%. Another solution of
1. 0 answers
2. 523 views
A standard solution with a FeSCN2+ concentration of 1.55x10^-4M has a percent transmittance (%T) of 18.8%. Another solution of
1. 1 answer
2. 609 views
5.00 mL of 2.00x10^-3M Fe(NO3)3 is mixed with 4.03 mL of 2.00x10^-3M NaSCN and 1.08 mL of 0.1M HNO3, for a total volume of 10.11
1. 1 answer
2. 586 views
Interest is a concept familiar to most people: every credit card in existence has a term called annual percentage rate (APR),
1. 2 answers
2. 1,521 views
The formula for simple interest is where I is the amount you will pay in interest, r is the rate at which interest will accrue,
1. 2 answers
2. 1,274 views
Gabe is the human resource manager for the Advanced Scientific Research Lab. He has to recordthe heights (in centimeters) and
1. 2 answers
2. 2,290 views
Consider the titration of 50.00 ml .250 M HBr with .100 M Ba(OH)2.What is the pH after the following additions of Ba(OH)2 to the
1. 2 answers
2. 490 views
A pilot, whose mass is 91.0 kg, makes a loop-the-loop in a fast jet. Assume that the jet maintains a constant speed of 125 m/s
1. 5 answers
2. 2,844 views
Using the difference for formula, find the tan 255.Step by step would be appreciated
1. 1 answer
2. 625 views
Math Quiz please help fastWrite the following ratio in simplest form: 32 min:36 min (1 point) 8:9 8:36 32:9 128:144 2. Marie
1. 3 answers
2. 806 views
(4x-5)^2
1. 3 answers
2. 293 views
(5x+4)(5x-4)=
1. 1 answer
2. 278 views
You apply a potential difference of 5.00 V between the ends of a wire that is 2.65 m in length and 0.654 mm in radius. The
1. 1 answer
2. 888 views
Carla and Candice left from the same place at the same time and rode their bikes in the same direction along a straight road .
1. 1 answer
2. 809 views
The area of each trapezoid is 3 times the area of one triangle. The area of one triangle is six square units. What is the total
1. 1 answer
2. 740 views
2. True or false. Suppose the slope of a straight line L is -3/4 and P is a given point on L. If Q is a point on L lying 2 units
1. 1 answer
2. 353 views
A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to
1. 0 answers
2. 1,062 views
There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a
1. 2 answers
2. 667 views
γ is a permutation on eight elements, though you are not told which permutation it is. If γ is applied to an 8-element set,
1. 0 answers
2. 450 views
A body of mass 6kg moving at 8m/s collides with a stationary body of mass 10kg and sticks to it. Find the speed of the composite
1. 1 answer
2. 1,201 views
f(x) is a cubic polynomial that satisfies f(1)=f(2)=f(3)=4 and f(0)=0. What is the value of f(7)?
1. 2 answers
2. 522 views
Bret and Shawn are playing a game where each turn the players roll a 20-sided die fair and then add the number they get to their
1. 3 answers
2. 597 views
A number is called algebraic if there is a polynomial with rational coefficients for which the number is a root. For
1. 1 answer
2. 425 views
A 15 kg, 1m wide door which has frictionless hinges is closed but unlocked. A 400 g ball hits the exact middle of the door at a
1. 2 answers
2. 639 views
Six boxes labeled 1,2,…,6 are arranged in a line. Seven identical balls are to be placed into the boxes such that for any 1
1. 0 answers
2. 929 views
A 15 kg, 1m wide door which has frictionless hinges is closed but unlocked. A 400 g ball hits the exact middle of the door at a
1. 3 answers
2. 505 views
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector
1. 0 answers
2. 364 views
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector
1. 1 answer
2. 338 views
A point P is given outside of a circle Γ. A tangent from P to Γ touches Γ at T with PT=45. A line from P cuts Γ at the 2
1. 2 answers
2. 602 views
ABCD is a parallelogram with side lengths AB=15,BC=10 and ∠ADC=75∘. A point P in the interior of the parallelogram is chosen
1. 2 answers
2. 544 views
When Lino submitted an essay for his English class, it was 9 pages long. Lino's essay had errors on pages 2 and 7. If the
1. 1 answer
2. 1,183 views
x and y are positive values satisfying x + y = 1/4. When ln(y^2+4xy+7) attains its maximum (subject to the given constraint),
1. 1 answer
2. 453 views
I invested $3,000, part at 2% and the rest at 5% simple interest. After 1 year, I earned a total of $117 in interest. How much
1. 1 answer
2. 896 views
A radio station on the surface of the earth radiates an EM-wave with an average total power of 50 kilo-watts. Assuming the
1. 0 answers
2. 440 views
Four acrobats of mass 61.0 kg, 68.0 kg, 62.0 kg, and 55.0 kg form a human tower, with each acrobat standing on the shoulders of
1. 0 answers
2. 734 views
For safety in climbing, a mountaineer uses a nylon rope that is 55 m long and 0.9 cm in diameter. When supporting a 88-kg
1. 0 answers
2. 575 views
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 3.4 m long.
1. 1 answer
2. 877 views
A 7mL triprotic acid was analyzed and found to contain 0.2572 grams of acid, evidence of phosphate group. Find the molecular
1. 0 answers
2. 449 views
I am helping my friend move into his new apartment. During the move, we have to load boxes into the back of his truck. To make
1. 1 answer
2. 852 views
The volume of the 3-dimensional structure formed by rotating the circle x^2 + (y-5)^2 = 1 around the x-axis can be expressed as
1. 1 answer
2. 379 views

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