Saturday

February 13, 2016
Total # Posts: 409

**Physics**

How much work does a 50 kg student to climb 3 meters high stairs
*January 20, 2016*

**physics **

As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m from the original position...
*January 4, 2016*

**Calculus**

I am standing on the roof of a building with a pea shooter, and I shoot a pea up into the air from a height of 80 feet. The pea reaches its maximum height 2 seconds after I shoot, then falls to the ground. Give the position of the pea as a function of time
*December 8, 2015*

**Statistics**

I have gotten the concept of probability but the following question has really stumped me. Help please. The probability that a tomato seed will germinate is 0.9. Estimate the probability that of 100 randomly selected seeds, at least 86, but no more than 91 of them will ...
*December 5, 2015*

**math**

there are 5 pounds of apples in one bag. Make a table to show how many pounds of apples are in 6 bags
*November 29, 2015*

**math**

To date, Jay Ward has xumulative earnings of $ 107,600. This week he is paid $3,000. What is the total amount of Social Security tax for this week? Assume a rate of 6.2% on $110,100 for Social Security and 1.45% for Medicare.
*November 28, 2015*

**Finance**

Need Solution problem Nealon Manufacturing Company
*November 24, 2015*

**trig**

Find the component form of v and sketch the specified vector operations geometrically, where u = 4i − j, and w = i + 5j. v = −u + w v = ( , )
*November 2, 2015*

**Ela**

Don't know how to make them plural or singular possessive or plural possessive
*October 26, 2015*

**Ela**

Write each phrase below to make it a plural or singular possessive or plural possessive.the backpacks belonging to the girls,the covers of the bookd
*October 26, 2015*

**Chemistry**

Calculate the pH of each solution given the following or values: a. [H3O+] = 1 * 10-8M b. [H3O+] = 5 * 10-6M c. [OH-] = 4 * 10-2M d. [OH-] = 8 * 10-3M e. [H3O+] = 4.7 * 10-2M f. [OH-] = 3.9 * 10-6M
*October 13, 2015*

**chem**

Please give the complete mechanism for the acid catalyzed addition of methanol to 3 - methylbutene
*October 12, 2015*

**physics**

A ball is projected upward at time t = 0 s, from a point on a flat roof 10 m above the ground. The ball rises and then falls with insignificant air resistance, missing the roof, and strikes the ground. The initial velocity of the ball is Consider all quantities as positive in ...
*October 11, 2015*

**physic**

Between the orbits of Mars and Jupiter, several thousand small objects called asteroids move in nearly circular orbits around the Sun. Consider an asteroid that is spherically shaped with radius r and density 3000 kg/m3 . You find yourself on the surface of this asteroid and ...
*October 10, 2015*

**Math**

x/(x+1) - 2/(x-1)= 1 I have been trying to solve it but I do not know the steps to solve it.
*September 27, 2015*

**Chemistry**

Can I know the molarity of acid rain?
*September 13, 2015*

**science **

In the cabin of a jetliner that cruises at 600km/h, a pillow from an overhead rack falls into your lap below since the jetliner is moving so fast, why doesn't the pillow slam into the rear of the compartment when it drops? What is the horizontal speed of the pillow ...
*September 9, 2015*

**Math**

144x+21x squared??
*September 3, 2015*

**algebra**

whats the difference between a 16 ounce brick and a carpenter?
*August 18, 2015*

**Math**

How to find the perimeter of a 10 step staircase
*May 4, 2015*

**geology**

1950 + 979 = 2929 1950 + 1843 = 3793
*April 23, 2015*

**math**

Renee is a sales associate at a store. She earns $80 a week plus a 15% commission on her sales. Last week, she sold $200 worth of items. What is the total amount Renee earned for the week? How much did she earn from commission?
*April 15, 2015*

**math**

Two months ago, the mean daily rainfall in a local city was 9.4 cm. The mean absolute deviation was 3.5 cm. Last month, the mean daily rainfall in that city was 11.5 cm, and the mean absolute deviation was 1.6 cm. Which statement about the rainfall is true
*April 13, 2015*

**trig**

solve triangle ABC which have angleA=25.25,angleB=60.51 and a=3.82..find c...,find b
*April 11, 2015*

**biology**

So basicaly what you have to do here is look at the question real hard close your eyes thing about this, 2 girls in one cup. Then open your eyes and you will know that white and smooth is the highest experimental value. With this you can assume that the others are just ...
*April 10, 2015*

**math**

Suppose a 25-foot ladder is leaning against a wall making a 63 degree angle with the wall. How high up th wall is the end of the ladder?
*March 19, 2015*

**math**

84 inches by 54 inches how many square inches will Paige have to paint the front side of the door?
*March 16, 2015*

**chemistry**

220.3 lbs = 100016.2 g 500. gallons= 1892.5L 100016.2g (NH4)(NO3)X 1 MOL/80.052 g/MOL= 1249.39 MOLES. 1249.39 MOLES/ 1892.5L = 6.60X10^-1 MOL/L (NH4)(NO3)
*March 13, 2015*

**Chemistry **

Calculate the mass of 5.35 mol of iodine
*March 12, 2015*

**math**

They're 32 more apples than oranges at a fruitstand. Howany apples and oranges could there be?
*February 9, 2015*

**Pre-Calculus**

Describe the function resulting from reflecting f(x)=x^3+2x^2-x+5 about the y-axis and then shifting to the left by 4. Is this the same as performing the operations in the reverse order
*February 3, 2015*

**algebra **

The perimeter of a rectangular piece of plastic is 22 millimeters. The area is 30 square millimeters. What are the dimensions of the piece of plastic?
*January 27, 2015*

**chemistry**

chemical reactions type?
*November 30, 2014*

**English 10**

noun clause
*November 19, 2014*

**Intro to Accounting **

Jimenez Enterprises issued 8%, 9-year, $2,486,400 par value bonds that pay interest semiannually on October 1 and April 1. The bonds are dated April 1, 2014, and are issued on that date. The discount rate of interest for such bonds on April 1, 2014, is 8%. What cash proceeds ...
*November 5, 2014*

**Calculus **

Your firm offers to deliver 250 tables to a dealer, at $160 per table, and to reduce the price per table on the entire order by 50 cents for each additional table over 250. Find the dollar total involved in the largest possible transaction between the manufacturer and the ...
*November 3, 2014*

**physics**

the distance of the and is 30m so if a person starts running towards the bank with a velocity of 10m/s then the distance of the bank will be 31 because you add the one second and then divide by your 10m/s
*September 16, 2014*

**Physics**

An airplane flies 220 km due east, makes a right-angle, and then flies 400 km due north. Find the magnitude of the plane's displacement from it's starting point. Neglect the culrvature of the earth
*September 14, 2014*

**Pre-Calculus**

Two polynomials P and D are given. Use either synthetic or long division to divide P(x) by D(x),and express the quotient P(x)/D(x) in the form P(x)D(x) = Q(x)+ R(x)D(x) . P(x) = 6x^4 − 3x^3 + 29x^2, D(x) = 3x^2 + 13
*September 14, 2014*

**Pre-Calculus**

Two polynomials P and D are given. Use either synthetic or long division to divide P(x) by D(x),and express the quotient P(x)/D(x) in the form P(x)D(x) = Q(x)+ R(x)D(x) . P(x) = 6x4 − 3x3 + 29x2, D(x) = 3x2 + 13
*September 14, 2014*

**Science **

If the temperature rose from 25C to 45C how many degree Fahrenheit would that be
*September 10, 2014*

**5th grade math**

What is the best estimate for the product of 289 and 7
*August 25, 2014*

**math**

how many different rectangles having an area of 81 square centimeters can you draw if the length and width have an integral value?
*August 10, 2014*

**Math**

A student rented a bicycle for a one-time fee of $12.00 and then a charge of $o.85 per day.She paid $28.15 for the use of the bicycle. How many dats did she keep it?
*May 28, 2014*

**Math**

5{3a-2b(3a+6b)+6a}
*May 28, 2014*

**Science**

blah blah
*May 28, 2014*

**math**

create a function that models In dollars the total payout T2 after a given month × the listedgraph month is X 6 months M2 IS 2¢ 6¢ 8¢ 10¢ 12¢ and T2 is 3¢ 7¢ 13¢ 21¢ 31¢ 43¢ (hint) t2 is just a double transformation ...
*May 13, 2014*

**Physics**

If a car engine has a power,P. Write an expression for the time it will take to accelerate from w to 4w. Note that P=wt where t is torque.
*April 27, 2014*

**Math **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.
*April 4, 2014*

**Math **

The curvature of a circle with radius r is defined as Descartes’ formula gives a relationship between the curvatures of the four circles. What are Descartes’ formula and the curvature of a circle? What does the sign of the curvature of a circle mean? State Descartes...
*April 4, 2014*

**Math **

An organization is planning a dance. The band will cost $400 and advertising costs will be $100. Food will be supplied at $2 per person. a. How many people need to attend the dance in order for the organization to break even if tickets are sold at $7 each? b. How many people ...
*April 4, 2014*

**Math **

The percent grade of a highway is the amount that the highway raises or falls in a given horizontal distance. For example, a highway with a four percent grade rises 0.04 mile for every 1 mile of horizontal distance. a. How many feet does a highway with a six percent grade rise...
*April 4, 2014*

**PC **

A piece of a broken wheel is shown. It was taken to a machine shop to be replaced with a new “whole” wheel. Find the radius of the wheel AC=10cm, BD=3 cm and D is the midpoint of AC. Round to the nearest hundredth.
*April 4, 2014*

**statistics**

If boys and girls are equally likely to be born, what is the probability that in a randomly selected family of 6 children, there will be at least one boy? (Find the answer using a formula. Round your answer to three decimal places.)
*March 30, 2014*

**math**

There are 2 leaves along 3 in.of an ivy vine. There are 14 leaves along 15 in. of the same vine. How many leaves are there along 6 in. of the vine?
*March 27, 2014*

**Math**

Becca wants to make a giant cherry pie to try to break the world record. If she succeeds in making a pie with a 20 foot diameter, what will be the total distance around the pie?
*March 16, 2014*

**Math**

How many square inches of crust would it take to cover the bottom of a pie dish with a 15 diameter?
*March 16, 2014*

**Math**

Pam served her apple pie on a 13 inch diameter dish. She wanted to tie a ribbon around the dish to make it a little more festive. How long does the ribbon need to be in order to fit around the dish?
*March 16, 2014*

**Fitness Topics**

When you massage an exercised muscle, you help to A. increase the efficiency for the removal of wastes. B. decrease the amount of oxygen moving to the muscle. C. decrease the amount of blood moving to the muscle. D. increase its lifting capacity. im going with B
*March 13, 2014*

**science**

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
*February 21, 2014*

**math**

Mr. Smith currently produces 45,000 bushels of potatoes a year. He Can increase his harvest by an average rate of 3% annually. How many years will it take until he can produce 50,000 bushels per year?
*February 12, 2014*

**physics**

60 mph
*February 3, 2014*

**cosmology**

1.3378e19
*January 19, 2014*

**Math**

Find the angel in degrees required to shoot a cannon a distance of 200 yards. It's speed is 400 mps.
*December 4, 2013*

**geometry**

Given the equation of the circle (x – 9)2 + y2 = 484 , where is the center of the circle located at?
*November 12, 2013*

**science**

which of the following is the best course of action when it comes to using natural resources
*November 7, 2013*

**chem 211**

+334
*October 18, 2013*

**physics**

can someone post the ecuations? thanks
*October 5, 2013*

**Math**

Find two numbers the exact answer is between. 6x7381
*September 25, 2013*

**Physics**

940
*September 15, 2013*

**Precalculus**

So far i have gotten answers that i already knew. I know that 224=16t^2 goes to 14=t^2 but what squared equals 14?
*September 13, 2013*

**Precalculus**

That is my question, i don't know what t equals when 224=16t^2
*September 13, 2013*

**Precalculus**

A ball is dropped from a cliff that is 224 feet high. The distance S (in feet) that it falls in t seconds is given by the formula S=16t^2. How many seconds (to tenths) will it take for the ball to hit the ground?
*September 13, 2013*

**english**

how do you use atlas in more than one
*September 8, 2013*

**tax**

Business Investigation Expenditures. During January and February of the current year, Big Bang LLC incurs $3,000 in travel, feasibility studies, and legal expenses to investigate the feasibility of opening a new entertainment gallery in one of the new suburban malls in town. ...
*July 31, 2013*

**pcc**

A volume of 40.0mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 21.7mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)→K2SO4(aq)+2H2O(l)
*July 15, 2013*

**math**

What is the unit rate? 1500 meters in 6 seconds?
*July 10, 2013*

**finance**

Based on the following information, calculate the coefficient of variation and select the best investment based on the risk/reward relationship. Std Dev. Exp. Return Company A 10.4 15.2 Company B 14.6 22.9
*July 7, 2013*

**finance**

Based on the following information, calculate the required return based on the CAPM: Risk Free Rate = 3.5% Market Return =10% Beta = 1.08
*July 7, 2013*

**Math**

Gerald can complete a math assignment in 2 hours and a physics assignment in 1 hour. If he has 8 hours to complete a set of assignments, how many math assignments can he complete if he decides to leave the science assignments for the next day? This situation is given by 2x + y...
*May 27, 2013*

**MATH**

THERE ARE 2 SPINNERS ONE IS LABLED A-D THE OTHER IS LABLED 1-8. WHAT IS THE PROBABILITH OF SPINNING EITHER AN A OR B AND EITHER A 1 OR 2. ANSWERS GIVEN ARE 0.0625,0.116,0.125,AND 0.18
*May 22, 2013*

**college algebra**

5^n+7+8=
*May 16, 2013*

**College Chemistry**

For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
*April 12, 2013*

**ece**

Primary classroom rely more on----------- assessment than do preschool classroom
*April 12, 2013*

**College Chemistry**

For each trial, enter the amount of heat lost by the calorimeter, qcalorimeter. Be careful of the algebraic sign here and remember that the change in temperature is equal to the final temperature minus the initial temperature. Report your answer using 4 digits. Note, this is 1...
*April 9, 2013*

**Math-Statistics**

Assume that 60% of community college students are female. 1) If we pick 10 students at random justify why we can or cannot model this using a normal model. 2) Find the probability that 8 of the 10 students selected are female. 3) Find the probability that 8 of more of the 10 ...
*April 8, 2013*

**Statistics**

A study of two groups of children since early childhood: One group of 62 attended preschool. A control group of 61 children from the same area and similar backgrounds did not attend preschool. Over 10 year period as adults, 38 of the preschool sample and 49 of the control ...
*April 8, 2013*

**Chemistry**

1. Which metal is the most easily oxidized? A.) highly active metal *B.) moderately active metal C.) slightly active metal D.) an inactive metal 2. What happens in a voltaic cell? *A.) Chemical energy is changed to a electrical energy. B.) Electrical energy is changed to ...
*March 27, 2013*

**math**

joe draws a line segment 2 1/4 inches long. then he makes the line segment 1 1/2 inches longer. how long is the line segment now?
*March 21, 2013*

**Physics please help!!**

Assume a circular orbit. If a planet's distance from it star is multiplied by 25 times, then by how many times is its orbital period T multiplied ?
*March 4, 2013*

**Physics please help!!**

A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.23 hours. What is density of the planet? Assume that the planet has a uniform density.
*March 4, 2013*

**Physics**

I'm Try a But the b is: ((sigma*x)/(2*epsilon_0))*(1/(sqrt(x^2+R_1^2))-1/(sqrt(x^2+R_2^2)))
*February 25, 2013*

**halp!**

what do I use for a and k in this situation? i tried taking the derivative but no answers i come up make sense based on the problem.
*February 24, 2013*

**Calculus**

The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...
*February 24, 2013*

**Math**

The number, N, of people who have heard a rumor spread by mass media by time, t, is given by N(t)=a(1−e−kt). There are 6 million people in the population, who hear the rumor eventually. If 5% of them heard it on the first day, find the percentage of the population ...
*February 24, 2013*

**Physics**

(x*Q)/(4*pi*epsilon_0*((R)^2+(x)^2)^(3/2))
*February 21, 2013*

**Physics**

and the 2) (B) is 0.5
*February 21, 2013*

**Physics**

b) 1283994.39504
*February 21, 2013*

**Physics**

c) 46.244
*February 21, 2013*

**Physics**

The First is -7.901. Just this in the moment.
*February 21, 2013*