# Posts by sandy

Total # Posts: 823

**STATISTICS**

90% CONFIDENCE FOR THE MEAN TIME TO COMPLETE A TEST. POPULATION STANDARD DEVIATION OF 3 HOURS. SAMPLE SIZE IF THE ERROR SHOULD BE LESS THAN A HALF HOUR?

**Calc**

FInd the derivative of each of the following function. f(x)=xcosx+x^4e^2x All I know is the rule with the e^u equation where you would do e^2x times 1. other than that I dont know what to do can someone please help and show all work I will appreciate it greatly

**Math**

Debbie flipped a coin 20 times. The result were 7 heads and 13 tails. What is the relative frequency of heads for her experiment?

**Math**

Ok so is this correct? 20x + 60x= 720 80x=720 X=9 length of base

**Math**

Thank you

**Math**

The area of a trapezoid is 720 cm square. The height is 10 cm. The two bases of the trapezoid are parallel. Find the length of each base, if one base is 3 times as long as the other.

**education**

I need help finding a local public policy web site and federal public policy website on foster care.

**quick question**

Thank you! I was just wondering for my theater class bc we had to watch a play for our final and I watched a muscial

**quick question **

Are muscials considered plays?

**pre calc**

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it wrong i then tried rounding it to 671000 but it was still ...

**pre calc**

900000e^5(1/2ln(1/8) This is ithe answer if you were wondering lmao who would have known

**pre calc**

Its still wrong omg I dont know why

**pre calc**

computer marked it wrong*

**pre calc**

The population of a Midwestern city decays exponentially. If the population decreased from 900,000 to 800,000 from 2003 to 2005, what will be the population in 2008? Please help I got 670,422 and the computer marked it round i then tried rounding it to 671000 but it was still...

**Math**

The volume of this cube is 343 cubic yards. What is the value of t?

**Math**

A positive integer is 2 less than another. If the sum of the reciprocal of the smaller and twice the reciprocal of the larger is 5/12, then find the two integers. algebraic expression is: 1/n-2 + (2)1/n = 5/12

**Algebra**

-9 times the difference between a number and 63 is equal to the number plus 49 .Write the equation.

**math**

On December 10, 1999, Apple Computers' stock was valued at $615 billion; Microsoft's stock was valued in that quarter at $271 billion. How much more value is Apple's stock at its peak over Microsoft?

**Math**

An employee's annual salary was increased from $22,464.00 to $24,710.40 last year.If it is increased by the same percent this year,what will be the employee's salary? Thanks!

**Math**

12%+17%+3%=0.144612 The correct answer is 32% Please break it down to me where I can understand it. Thanks

**ashworth**

If the manager __________ here, we could meet the person who __________ all loans. A. were; approves B. was; approves C. were; approve D. was; approve

**algebra**

For three consecutive odd integers, the sum of 3 times the first integer and 2 times the second integer is 77 less than 4 times the third integer. What are the three integers? Please show work thank of you

**science**

calculate the mass of 120 cc of nitrogen at NTP. How many number of molecules are present in it?

**Math**

Matchstick Rings each pattern of square rings has been made with matchsticks which are all the same length. If the length of one side of a square ring is "m" matchsticks, try to find a formula, in terms of m, for each of the following: a) The outer perimeter, P. b) ...

**Math**

Building Bricks A child is playing with building bricks like this one. He decides to build the simple tower shown. How many bricks would he need to build this tower? If the last column was 14 bricks high how many bricks would he need? If the last column was 50 bricks high how ...

**MATH**

A beautiful Princess is locked inside the Castle. A Moat 15 metres wide surrounds the Castle. A Knight is attempting to rescue the Princess but he only has two planks of wood, both 14.5 metres long. How can the brave Knight bridge the Moat and rescue the Princess. Draw ...

**Math of investigation**

Apply Pythagoras to the right angle with sides 2r, 12-2r and 9-2r. This leads to the equation 4r2 – 85r + 225 =0 which solves to give r = 3.15 In the case where breadth is ‘b’ and the length is 2b, form the right angled triangle with sides 2r, 2b-2r and b-2r and...

**Math of investigation**

Two identical circles are to be cut from a 12cm by 9cm sheet of paper. What is the maximum possible radius of these circles? Show that if the length of the sheet of paper is twice the breadth of the paper, then the radius of the largest circles which can be cut out is half of ...

**SOO URGENTT**

physics

**SOO URGENTT**

A circular loop lies with its plane normal to a magnetic field given by B=(0.200 - 0.0200t) T, where t denotes the time in seconds. The induced emf in the loop is 1.36 V. Calculate the radius of the loop.

**11**

SinA + sinB/sinA - sinB= tanA+B/2cotA-B/2

**Maths**

How would the perimeter be affected if the side of the rectangle were increased by a factor

**Math**

What the relationship that happens between the increase of the length of the side and area or perimeter

**Math**

36 miles per gallon to miles per quart. (1 gal=4 qt)

**Spanish**

Dio

**Math**

Ed is thinking of. number. If he adds four to his number, the result is less than 6. Write and solve an inequality about Ed's number

**Math**

In 35 minutes, 49 customers entered the store. At this rate, how many customers will enter the store in 2 hrs?

**Chemistry**

What is mass in grams of a pure iron cube that has a volume of 4.10 cm3

**science**

when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?

**Operations with Integers**

On a summer day, the low temperature of 75°F was reached at 6 am. The high temperature was reached 9 hours later, after the temperature rose 16°F. What was the high temperature that day?

**Math**

Green with a stereo dark interior

**Math**

An automobile manufacturing plant produces cars according to a fixed pattern. During one day, the first five cars have the following colors and equipment. blue with a stereo and dark interior white with a stereo and light interior green without a stereo and with a light ...

**Marh**

An automobile manufacturing plant produces cars according to a fixed pattern. During one day, the first five cars have the following colors and equipment. blue with a stereo and dark interior white with a stereo and.light interior- green without a stereo and with light....

**Math - Help!**

I trust you, too. I, too, got the same answer. But, bobpursley unexpectedly thought it was wrong or something.

**Math - Help!**

Bobpursley said I was wrong on the second one, I ORIGINALLY got 13/18. And, he said I got it wrong. But, I did. Click on my name, and go to "Are all answers right?" Strange, but thank you.

**Can someone check the answers?**

Please?

**Math - Help!**

A quality supervisor for a factory that makes cell phone cases examines a sample of 46 cases. She finds that 8 cases are the wrong size. Which is the best prediction of the number of cases that will be the wrong size in a shipment of 3,000? A. 410 B. 475 C. 506 D. 522 ***

**Math - Help!**

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6) (6,1)|(6,2)|(6,3)|(6,5)|(6...

**Algebra**

Can someone help me with this? You have 2 tests with scores of 83 and 92, assuming you can't get a score over 100 on any test. Determine all possible scores you can get to score an average of 90 on all 3 tests. Represent the answer algebraically.

**One Math**

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6) (6,1)|(6,2)|(6,3)|(6,5)|(6...

**Are all answers right?**

No, is 5/6 the answer?

**Are all answers right?**

You mean, it's 5/6...?

**Are all answers right?**

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6) (6,1)|(6,2)|(6,3)|(6,5)|(6...

**Is it correct?**

Please correct me if I'm wrong.

**Help Math**

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6) (6,1)|(6,2)|(6,3)|(6,5)|(6...

**Check math please!**

Okay, wanted to make sure. Thank you! :)

**Check math please!**

So... let me get this straight, I got both right?

**Check math please!**

Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects? A. 3/8, 0.375, 37.5% B. 8/5, 1.6, 16% C. 5/8, 0.625, 62.5...

**Check math please!**

Anna mixes the letters S, E, L, E, C, T, E, and D thoroughly. Without looking, Mary draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that E will NOT be the letter Mary selects? A. 3/8, 0.375, 37.5% B. 8/5, 1.6, 16% C. 5/8, 0.625, 62.5...

**art**

Why the weeping woman is an example of shapes?

**art**

why did Picasso use cubism/ shapes in weeping woman?

**math**

Amanda can run 4/5 of a mile in 9 minutes.Express her speed as a unit rate in miles per hour.

**math**

input 10 output 5 input 15 output 6 input 20 output 7 input 25 output 8 what is the pattern thanks

**Math**

11 games x 12 teams doubled, because each team plays the same amount of games twice = a total of 264 games

**Math**

12 x 22= 264

**Math**

132i. Is not the right answer

**Math**

I am getting 264

**Math**

Hillside has 12 teams. Each team plays each other teams twice. How many games are played?

**Math**

I see thank you!

**Math**

Not understanding I am getting 3hrs for 28 people

**Math**

The ski trip has to be cancelled. All 28 people must be told. In the first hour 2 people each call 2 people. The next hour each of the people called the hour before calls 2 people, and so on. How many hours will it take for all 28 people to be called?

**MATH**

help with expanding log base 5(x^2 times y)^4

**Math**

Finneas plays with his toy mouse for 1/10 hour. then he chases a fly for 1/6 hour. How much longer does he spend chasing a fly than playing with his toy mouse?

**Math**

A computer screen measures 200mm by 150mm. What is the length of the diagonal?

**Math**

A square television screen has 19-inch diagonal. How long is a side of the screen, to the nearest tenth? Length of side______ Area_____

**Math**

Thank you

**Math**

A square television screen has 19-inch diagonal. How long is a side of the screen, to the nearest tenth? Length of side______ Area_____

**Math**

The student council sold refreshment at cost. A case of 24 cans of the fruit punch cost $7.68. Each can fills 1 cup of punch. A box of 48 cups cost $1.44. How much did the council charge for a cup of fruit punch?

**physics**

A box containing food supplies for a refugee camp was dropped from a helicopter flying horizontally at a constant elevation of 414.1 m. If the box hit the ground at a distance of 95.3 m horizontally from the point of its release, ... a) what was the speed of the helicopter? b...

**math**

From the top of a light house the angle of incidence of the two ships are 45&30 degree respectively if both the ships are at a distance 200m from each other then find out the height of the light house

**Math**

The odometer on a car shows 26962 km. Notice that this number is a palindrome. After the car has travelled two hours at a constant rate, the odometer shows the next possible palindromic number. How fast is the car travelling?

**Math**

9 cents

**community psycology**

How each of “the four acts of qualitative research” would apply to you personally if you was doing this study. for prescription drug addiction

**physics**

When a car moves up an incline, does the kinetic energy and potential energy decrease or increase?

**algebra i**

two rubber balls are dropped from two different heights 136 ft and 287 ft. Find the function that describes them. I believe it is H(t) = -16t^2 + 136 and H(t) = -16 ^2 + 287. There are no answers in the book . I assumed velocity is 0. Am I correct? Thanks, Sandy

**Math quadratic function**

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the ball at that ...

**Math grade 11 uni**

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the ball at that ...

**Math grade 11 u**

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the ball at that ...

**Politics**

Which of the following statements about interest groups is correct?

**Math**

I have no idea how to do inverse functions... How would I do this question? Y=-3x^2 - 18x - 25

**physics**

A bullet is fired through a wooden board with a thickness of 10.0 cm. The bullet hits the board perpendicular to it, and with a speed of +390 m/s. The bullet then emerges on the other side of the board with a speed of +234 m/s. Assuming constant acceleration (rather, ...

**6th grade math**

6th grade

**6th grade math**

Mrs Roberts is 3 times as old as her son. The sum of their ages is 48 years. How old was Mrs. Roberts when her son was born?

**4th Grade Math**

The ratio of the number of dogs to the number of cats at an animal shelter is 5:4, if there is a total of 153 cats and dogs, how many cats are in the shelter

**physics**

Solve

**Math**

Kenji has a box containing many blue rods, each one 252 cm long. Mei-Ling has a box containing many green rods, each one 408 cm long. They each start making a long line of rods of their colour by laying rods end to end. After a while, their lines are exactly the same length. ...

**MATH**

That is the way it was written to me and I think that is why it is so confusing since I can't get any of the listed answers. The lesson doesn't give any instructions either. I think the 14.25% is charged on the $700 because he/she forfeited the 0%. I also got 70.17 but...

**MATH**

Really need help with this: You purchase a computer for $875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay $100.00/month and that if you miss a payment, you will be assessed a late fee of $39....

**Math**

Really need help with this: You purchase a computer for $875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay $100.00/month and that if you miss a payment, you will be assessed a late fee of $39....

**MATH**

You purchase a computer for $875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state that you must pay $100.00/month and that if you miss a payment, you will be assessed a late fee of $39.00 plus the interest accrued...