# Randy

Newest questions and responses by Randy-
## physics

A ball is thrown straight upward and returns to the thrower's hand after 2.75 s in the air. A second ball thrown at an angle of 34.0° with the horizontal reaches the same maximum height as the first ball. (a) At what speed was the first ball thrown? ____

*asked on June 5, 2018* -
## math

What is (f-g)(x)? f(x)=3x^5+6x^2-5 g(x)=2x^4+7x^2-x+16

*asked on April 9, 2018* -
## math

What is (f·g)(x)? f(x)=x^4−9 g(x)=x^3+9

*asked on April 9, 2018* -
## math

What is (f+g)(x)? f(x)=x^2−36 g(x)=x^3+2x^2−10

*asked on April 9, 2018* -
## math

The function f(x) is the number of feet below the surface of the water a diver is at x seconds. After 14 s, the diver reached the maximum distance of 22 ft below the surface of the water. The diver stayed in the water for 20 minutes. What is the

*asked on April 9, 2018* -
## math

Which characteristic is correct for the function f(x)=−2x3+3x ? neither even nor odd even both even and odd odd

*asked on April 9, 2018* -
## Math

Net monthly income: $4,000 â€¢ Expected full mortgage payment (PITI): $1,000 â€¢ Student loan payment: $250 â€¢ Car payment: $300

*asked on March 17, 2018* -
## PHYSICS! -need help!-

A combination of an applied force and a frictional force produce a constant total torque of 38 N-m on a wheel rotating about a fixed axis. This combined force acts for 8 s, during which the wheel’s angular speed increases from 0 to 12 rad/s. Find the

*asked on December 5, 2017* -
## PHYSICS! -need help!-

A gymnast with a mass of 52 kg stands on the end of a uniform balance beam as shown in the figure. The beam is 5.50 m long and has a mass of 250 kg. Each support is 0.54m from the end of the beam. What is the force on the beam due to support 2?

*asked on December 5, 2017* -
## PHYSICS! -need help!-

A child pushes tangentially on a small hand driven merry- go- round. She is able to accelerate it from rest to 20 rpm in 10 s. Modeling the merry go round as a uniform disk of radius 3.5 m and mass 800 kg, find the torque required to produce that

*asked on December 5, 2017* -
## PHYSICS! -need help!-

A potter is shaping a bowl on a a potter’s wheel. The wheel rotaes at a constant angular speed. The frictional force between her hands and the clay is 2.50 N. How large is the torque she produces on the wheel if the diameter of the bowl is 14 cm.

*asked on December 5, 2017* -
## Physics!!! HELP!!

The carbon isotope 14C is used for carbon dating of objects. A 14C nucleus can change into a different kind of element, a neighbor on the periodic table with lower mass, by emitting a beta particle – an electron or positron – plus a neutrino or an

*asked on November 7, 2017* -
## -!!Physics!!- Really need help with this!

Three carts are moving on a frictionless horizontal track as shown in the figure. The 4.00 kg cart is moving to the right with a speed of 7.0 m/s, the 10.0 kg cart is also moving to the right with a speed of 6.0 m/s while the 3.00 kg cart moves to the left

*asked on November 3, 2017* -
## Physics! NEED HELP!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

*asked on October 19, 2017* -
## Physics!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

*asked on October 19, 2017* -
## Physics! Please help!!

HELP!! Two blocks of mass m1 = 320 g and m2 = 725 g are pushed by a force. The coefficient of kinetic friction between each block and the ground is 0.4. The blocks move together (with one pushing the other) with an acceleration of 225 cm/s2. What is the

*asked on October 8, 2017* -
## PHYSICS

Two blocks of mass m1 = 320 g and m2 = 725 g are pushed by a force. The coefficient of kinetic friction between each block and the ground is 0.4. The blocks move together (with one pushing the other) with an acceleration of 225 cm/s2. What is the value of

*asked on October 8, 2017* -
## Physics! Need help!

A 60 kg block slides along the top of a 100 kg block. The lighter block has an acceleration of 3.4 m/s2 when a horizontal force F= 370 N is applied. Assuming there is no friction between the bottom 100 kg block and the horizontal frictionless surface but

*asked on October 8, 2017* -
## Physics!

HELP!!! A box rest on an incline making a 34 angle with the horizontal. It is found that a parallel force to the incline of at least 240 N can prevent the box from sliding down the incline. If the weight of the box is 800 N, find the coefficient of static

*asked on October 7, 2017* -
## physics!

A taut massless string connects two boxes as shown in the figure. The boxes are placed on an incline plane at θ = 31.00. What is the acceleration of boxes as they move down the incline, given m2 = 1.6 kg, m1 = 7.6 kg, μ2 = 0.10 and μ1 = 0.20. Please

*asked on October 7, 2017* -
## Physics!

No matter what i do i can't seem to find a reasonable answer for this problem! I've done everything I can think of. Block m1( 7 kg ), lies on an incline plane with a coefficient of kinetic friction of 0.15. m1 is connected to mass m2 by a massless rope

*asked on October 7, 2017* -
## Sociology

What were some barriers to radical social change that could have made things better for freed people following the Civil War and Emancipation Proclamation?

*asked on September 23, 2016* -
## Algebra

In a recent year, a single person could expect to pay $4200 in income taxes on an adjusted gross income of $30,000. How much more tax should the person expect to pay if her adjusted gross income increased by $3000, knowing that this would not move her into

*asked on September 6, 2016* -
## math

still need help: Write an arithmetic sequence that has a common difference of 4 and the eighth term is 13. What is the first term? What is the 23rd term in the sequence

*asked on June 18, 2016* -
## Algebra

I am so lost on these problems. Write a geometric sequence that starts with 3 and has a common ratio of 5. What is the 23rd term in the sequence. Write an arithmetic sequence that has a common difference of 4 and the eighth term is 13. What is the first

*asked on June 18, 2016* -
## English

Which of the following is unimportant for an introduction in formal or academic writing? 1.Entertaining the audience. 2.Establishing the key point the piece of writing will make 3.Discussing your opinion on the topic for at least three sentences.

*asked on April 26, 2016* -
## Chem

Difference between K, K+, and K−. The question asks to put them in order from smallest to largest in radius but I don't understand the difference from them in terms of radius since they are the same element

*asked on March 11, 2016* -
## Math

2. Reed is on the ground looking up at Aaron, who is in a hot air balloon that is 140 ft above the ground. Reed and Aaron are 350 feet apart. What angle is Reed looking up at?

*asked on February 22, 2016* -
## chemistry

What is the pH of a buffer solution that has CH3CO2H=0.68 M and CH3CO2- =0.58 M, and has 0.01 M concentration of H2SO4 added to it? Ka of acetic acid is 1.8x10-5

*asked on November 12, 2015* -
## chemistry

The solubility of Na3(PO4) is 0.025 M. What is the Ksp of sodium phosphate?

*asked on November 12, 2015* -
## chemistry

What is the pH of a 0.5 M solution of NaHCO3? Kb = 2.4x10-8 (base)

*asked on November 12, 2015* -
## Geometry

What is the pOH if the (OH-) is 1 x 10 -10 ? Please show your work? Plug the numbers into the formula

*asked on September 25, 2015* -
## Geometry

How do you find the coordinates of the image of J (-7,-3) after the translation (x,y) (x-4,y+6)

*asked on September 15, 2015* -
## Physics

I've read all my resource materials and looked for outside resources already and i can't find an equation for this. I would appreciate any help

*asked on July 8, 2015* -
## physics

The angular speed of a rotor in a centrifuge increases from 428 to 1400 rad/s in a time of 6.26 s. (a) Obtain the angle through which the rotor turns. (b) What is the magnitude of the angular acceleration?

*asked on July 7, 2015* -
## Geomerty

If the length of one side of a right triangle is known, the length of the other two sides with corresponding angles can be found. Answers: - only the hypotenuse can be found - this is not true -this is true only if the angles are given in radians What is

*asked on May 13, 2015* -
## MATH

what is the rule of the function table if the input is 1,8,5,10 and the output is 4,6,1,5

*asked on February 24, 2015* -
## calculus

When an oil well burns, sediment is carried up into the air by the flames and is eventually deposited on the ground. Less sediment is deposited further away from the well. Experimental evidence indicates that the density (in tons per square mile) at a

*asked on February 19, 2015* -
## physics

a boy of mass 40kg and a girl of 30kg play on a see saw of negligible weight.if the boy sits 270cm from the pivot of the see-saw where must the girl sit to make it balance

*asked on February 8, 2015* -
## Math

Write whether the statement is true or false. If false write a true statement. 1. A right triangle has three right angles. False a right triangle has 1 right angle 2. A triangle that has three sides of the same length is an equilateral triangle. True

*asked on January 25, 2015* -
## Math

True or false and if false write a true statement 1. A right triangle has three right angles. 2. A triangle that has three sides of the same length is an equilateral triangle. 3. An obtuse triangle has two angles that are acute. 4. In a right triangle the

*asked on January 25, 2015* -
## Calculous

g(x) = x^4-8x^3-16x^2+128x the graph goes through the x through (-4,0) , (0,0) (4,0), (8,0) horizontal axis has a scale of 2,4,6,8,10 (each tick increases by 2) Y-axis value that is the highest is (-4,30) and (8,30) Assume g(x) = k(x-p)(x-q)(x-r)(x-s) p

*asked on December 6, 2014* -
## Calculous Finding K, using zeros

Suppose f(x) has zeros at x = -3, x = 3, x = 5, and a y-intercept of 17. In addition, f(x) has the following long-run behavior: as x -> +-infinity, y -> +infinity Find the formula for the polynomial f(x) which has the minimum possible degree F(x) =

*asked on December 5, 2014* -
## PHI

What is Larmer’s criticism of Duska’s argument? Loyalty is relative. Loyalty does not need to be reciprocal, it can still be directed at persons in the firm and not merely to the firm, an economic motive does not rule out a moral justification for

*asked on November 22, 2014* -
## MATH

Find the formulas for the functions f(g(x)) and g(f(x))when f(x) = 2/x and g(x) = 2x^2-1 f(g(x)) = ? g(f(x)) = ? for f(g(x)) would it be 2/x(2x^2-1) or g(f(x)) 2x^2(2/x)-1? Would i solve like this? also when I tried to input the answer after solving didn't

*asked on November 21, 2014* -
## Math CHECK!

5 / 1 -sin theta + 5/ 1 - sin theta the correct answer is 25 / cos^2 theta or 10 / cos^2 theta

*asked on November 14, 2014* -
## Math

sec 7pi/4 without a calculator Find the exact answer

*asked on November 7, 2014* -
## PHI

Which of the following does Peter Singer assert about the principle of equality? (Points : 1) People should have equal rights because they are factually equal. People with higher abilities, it stands to reason, should have greater rights. Different groups

*asked on November 2, 2014* -
## chemistry

Isotonic saline is 0.89% NaCl (w/v). Suppose you wanted to make 1.0 L of isotonic solution of NH4Cl. What mass of NH4Cl would you need? Question 23 options: 1.6 g 8.1 g 8.9 g 54 g

*asked on October 30, 2014* -
## Math Trig

A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 40 degrees from level ground to the kite string. If she used a full 120-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and

*asked on October 24, 2014* -
## Trig calc

A) P is approximately (0.883, 0.469), is a point on the unit circle with angle 28 degrees estimate the following. Sin 152 degrees = Cos 152 degrees =

*asked on October 24, 2014* -
## Trig / Calc

What angle (in degrees) corresponds to 18.96 rotations around the unit circle? Enter the exact decimal answer.

*asked on October 24, 2014* -
## Pre-Calculous (Trig)

The Singapore Flyer, currently the world's largest Ferris wheel, completes one rotation every 37 minutes.1 Measuring 150 m in diameter, the Flyer is set atop a terminal building, with a total height of 165 m from the ground to the top of the wheel. When

*asked on October 18, 2014* -
## SAVE ME ( MATH)

function p(t) has a domain of 1 less than or equal to t less than or equal to 12 range of -40 < p less than or equal to 160 Find the domain and range for. Enter the exact answers A) P(1/4t+4) B) -1/10p(2t)+46

*asked on October 18, 2014* -
## history

Roosevelt addressed the struggles of industry with the National Industrial Recovery Act (NIRA). Which of the following was not one of the main components of this effort? African American labor assistance Public works projects National Recovery

*asked on September 28, 2014* -
## US History

Women made many contributions during World War I. Which area did they make the least impact? Nurses in the war Heavy industry Maintaining farms Truck drivers

*asked on September 27, 2014* -
## math

How many thousands of people live in Boston ma.if population is 617,594

*asked on September 17, 2014* -
## math

order the numbers from least to greatest. _ 1 4/5, 1.78, 1 5/6, 7/4, 1.7, 1 8/11 I am confused on going back and forth between decimals and fractions.

*asked on September 12, 2014* -
## statistics

You can answer any questions from the questions on an exam. In how many different ways can you choose the questions, assuming that the order in which you choose the questions is irrelevant?

*asked on August 6, 2014* -
## Statistics

Determine whether the following statements are true or false: 1. P(A and B)=P(B|A)P(B). 2. When A and B are independent, P(A)=P(B). 3. When A and B are independent, P(A|B)=P(A). 4. When A includes B, P(A|B)=1. 5. When B is the complement of A, P(A or B)=1.

*asked on May 22, 2014* -
## Statistics/Probability

So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

*asked on May 21, 2014* -
## Statistics/Probability

So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

*asked on May 21, 2014* -
## math

Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of trail mix should Mary buy to have enough trail mix without leftovers?

*asked on May 12, 2014* -
## chemistry

A sprinter set a high school record in track and field, running 200.0 m in 20.9s . What is the average speed of the sprinter in kilometers per hour

*asked on September 8, 2013* -
## chemistry

While in Europe, if you drive 105km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0mi/gal? Assume that 1euro = 1.26 dollars.

*asked on September 8, 2013* -
## chemistry

The conversion factor relating miles to meters is 1 mile= 1610m The speed of light is 3.00×10^8 m/s. How fast is this in miles per hour (miles/h \rm miles/h)?

*asked on September 8, 2013* -
## Math

Search Results for "Ruth has some money in a savings account. after the bank adds 5% interest to her account , she has $126. How much was in her account before the interest was added" How do i write this in an equation?

*asked on September 4, 2013* -
## math 160

If the mean of a set of data is 20.00, and 12.20 has a z-score of –1.30, then the standard deviation must be

*asked on June 11, 2013* -
## Statistics

*Give all probabilities to two decimal places. Three daily newspapers are published in a large city. Suppose we have the following facts about the people in the city: 60% read Newspaper A. 34% read Newspaper C. 72% read Newspaper A or Newspaper B. 18% read

*asked on March 12, 2013* -
## Statistics

A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

*asked on March 12, 2013* -
## Physics

Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals, for it can go from rest to 34.7 m/s in 3.03 s. If its mass is 102 kg, determine the average power developed by the cheetah

*asked on February 26, 2013* -
## Physics

In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.95 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice. As a result, the puck travels only one-half the

*asked on February 26, 2013* -
## Physics

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 78 kg, and the height of the water slide is 12.5 m. If the kinetic frictional force does

*asked on February 26, 2013* -
## Physics

A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m

*asked on February 26, 2013* -
## Physics

The drawing shows a skateboarder moving at 5.40 m/s along a horizontal section of a track that is slanted upward by 48.9 ° above the horizontal at its end, which is 0.582 m above the ground. When she leaves the track, she follows the characteristic path

*asked on February 26, 2013* -
## Physics

A bicyclist rides 2.78 km due east, while the resistive force from the air has a magnitude of 6.52 N and points due west. The rider then turns around and rides 2.78 km due west, back to her starting point. The resistive force from the air on the return

*asked on February 26, 2013* -
## Physics

The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this problem is the tension in the cable. A rescue helicopter lifts a 72.4-kg person straight up by means of a cable. The person has an

*asked on February 26, 2013* -
## Physics

A person pushes a 23.5-kg shopping cart at a constant velocity for a distance of 30.3 m on a flat horizontal surface. She pushes in a direction 31.5 ° below the horizontal. A 37.3-N frictional force opposes the motion of the cart. (a) What is the

*asked on February 26, 2013* -
## math

a car weighing 15000N rounds a curve of 60m. radius banked at angle of 30 degrees.find the frictional force acting on the tires when the car is travelling at 100kph.The coefficient of friction between the tires and the road is 0.90.

*asked on February 24, 2013* -
## Physics

Traveling at a speed of 15.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.640. What is the speed of the automobile after 1.45 s have elapsed?

*asked on February 14, 2013* -
## Physics

A 4.51-kg box is sliding across the horizontal floor of an elevator. The coefficient of kinetic friction between the box and the floor is 0.382. Determine the kinetic frictional force that acts on the box when the elevator is (a) stationary, (b)

*asked on February 14, 2013* -
## Physics

A rocket blasts off from rest and attains a speed of 30.4 m/s in 10.3 s. An astronaut has a mass of 60.1 kg. What is the astronaut's apparent weight during takeoff?

*asked on February 14, 2013* -
## Physics

The sun is more massive than the moon, but the sun is farther from the earth. Which one exerts a greater gravitational force on a person standing on the earth? Give your answer by determining the ratio Fsun/Fmoon of the magnitudes of the gravitational

*asked on February 14, 2013* -
## Physics

A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe,

*asked on February 14, 2013* -
## Physics

At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 940 m/s2 and the vertical or y component of its acceleration is 710 m/s2. The ball's mass is 0.35 kg. What is

*asked on February 14, 2013* -
## Physics

Two horizontal forces, F1-> and F2-> , are acting on a box, but only F1->is shown in the drawing. F2-> can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that

*asked on February 14, 2013* -
## physics

A tiger can run at approximately 100 km/hr (27.7 m/s) and a zebra at 80 km/hr (22.2 m/s). If both animals are running at full speed, with the zebra 70.0 m ahead, how long before the tiger catches its prey? a) 12.6 s b) 25.2 s c) 6.30 s d) 10.7 s

*asked on February 14, 2013* -
## math

If pump A and pump B work together, they can fill a pool in 4 hours. Pump A, working alone, takes 6 hours to fill the pool. How long would it take pump B, working alone, to fill the pool?

*asked on February 1, 2013* -
## SCIENCE

how do we derive the formula at=vf-vi if we will find acceleration? please have it step by step. Thank you

*asked on January 15, 2013* -
## Science

Please complete the formula and process in arriving the answer. Please. Thank you. Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel

*asked on January 14, 2013* -
## Science

Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel can accelerate at 5m/s^2, how long will it take for him to reach the speed of

*asked on January 14, 2013* -
## Physics

A dog is tugging forward on a leas held by a physics student who is standing still. The dog is tugging with a force of 63N. The student estimates the leash to be at an angle of 25 degrees above the ground. What is the tension in the leash?

*asked on January 13, 2013* -
## Math

1) Solve equation 3r+5 _____ + 2 = 2r to find the value of r? 2 A. 2 1/7 B. 3 2/3 C. 15 D. 10 2) which is these is a rational number. A. Sq root of 14 B. -sq root of 9 C. -sq root of 34 D. Sq root of 72

*asked on December 7, 2012* -
## Math

1) what is the length of the diagonal of a square whose sides are 3 inches long. A. 9 inches B. 3 square root 2 inches**** C. 6 inches D. 18 inches 2) which set of measure could be the side lengths of a right triangle? A. 0.9 cm, 1.2 cm, 1.5 cm B. 4 in, 4

*asked on December 7, 2012* -
## Algebra

- There are less than 40 members of the Landowners Association. These memebers vote on various proposals. All the members were present at a meeting and all voted on each of two proposals. On the first proposal 4 times as many memebers voted yes to those

*asked on December 6, 2012* -
## Algebra

A car rental company charges $24 per day plus $0.75 per mile driven. a) Let C = total cost; D = number of days and M = number of miles b) Write the equation for the total cost in terms of C, D and M c) Use the equation to determine the total cost for a

*asked on December 5, 2012* -
## math

how many terms are there on a 1/2 (a+b)? and are they monomial or binomial?

*asked on November 27, 2012* -
## Chemistry

Help with lab report Need Help finishing my lab report.KNOWN VALUES ARE V OF HCL=50ML,M=2.188.V OF NAOH=55.3ML,M=2.088.INTIAL TEMP FOR HCL=22.5C,NAOH IS 23C.this is for part A: Mass of final NACL solution assuming that the density of a 1 M Nacl solution is

*asked on October 26, 2012* -
## ECON 4346

4-The three fundamental economic questions of what, how, and for whom: a-exist because of scarcity. b-are much more serious in a socialist system. c-are not serious in a capitalistic system. d-are not relevant in the industrialized world of today. 5-When

*asked on September 19, 2012* -
## math

evaluate the following expression _(5)P_0=

*asked on August 29, 2012*