449 Answered Questions for the topic Precalculus Homework

11/29/17

#### A radioactive substance decays exponentially at a rate of 7% per hour. How long do you have to wait until the substance has decayed to 1/4 of its original size

I would like to know how to solve this

11/20/17

#### Can you help me with my Precalculus?

im really struggling. The question reads “How much 60% acid solution must be added to 20 ml of 30% solution to achieve a 50% acid solution?”
can you please help me?

11/20/17

#### Can you help me with my Precalculus?

the question I’m stuck on is “ solve 2/-6x - 3x/x-4 is greater than or equal to 0”
sorry I had to write it out different, there aren’t many options lol. If you can help me out, that would be great :)
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11/20/17

#### Can you help me with my Precalculus homework?

the question is “a ball is hit with an initial velocity of 80 feet per second from a tee 3 feet above the ground. What is the max height of the ball? When does it hit the ground?”
please help...
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11/20/17

#### Can you help me with my Precalculus?

the question reads “a box is formed by cutting squares out of the corners of a flat piece of metal and folding the sides up. What size cuts should I make to a 14 inch by 20 inch piece to get a...
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11/20/17

#### Can you help with my Precalc?

the question says “a rectangular animal pen is built. One side of it is the wall of a barn. It is 1680 ft sq. If Tom can put up the fence in 12 hours, how fast will bob have to work so that the...
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11/20/17

#### I’m not sure how to solve this

in my Precalculus homework, the question is “There has to be a rectangular area of 1680 ft sq. for my pig. There is the wall of a barn for one side. How much fencing would you need to buy?” Yes...
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11/14/17

#### A laser beam is to be directed toward the center of the moon, but the beam strays 0.5 ◦ from its intended path.

a) How far has the beam diverged from its assigned target when it reaches the moon? (The distance fromthe earth to the moon is 240,000 miles.)
b) The radius of the moon is about 1,000 miles....
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11/14/17

#### (1 mile = 5280ft)

How many revolutions will a car wheel of 30in make as the car travels 1 mile?

11/06/17

#### How do I solve this problem??

i have a problem on my precalculus homework. I’m having a rough time. It says “Find the power function that represents the points (5, 2), (7, 5) And (10, 9)”please help me. I’m having a lot of...
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11/06/17

#### How do I solve this problem?

i have a problem on my precalculus homework. I’m having a rough time. It says “Find the power function that represents the points (5, 2), (7, 5) And (10, 9)”please help me. I’m having a lot of...
more

11/05/17

#### How do I solve this problem?

im having trouble on my Precalc homework. This is the problem: “a box is formed by removing squares of side length x inches from each corner of a rectangular piece of cardboard 10 inches wide by 16...
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11/05/17

#### How do I solve this problem?

im having a bit of trouble finishing my Precalc homework. The problem is “find a polynomial function with zeros of (-2, 4, 3+i (imaginary number)) I’m really struggling and it’s due tomorrow....
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11/05/17

#### How do I solve this problem?

im having trouble on my Precalc homework. This is the problem: “a box is formed by removing squares of side length x inches from each corner of a rectangular piece of cardboard 10 inches wide by 16...
more

11/05/17

#### How do I solve this problem?

my precalculus homework has this problem: “x5+x4-3x3-11x2-28x-60=0 hint:2i is a solution” Im not sure how to solve this

11/05/17

#### How can I figure this problem out?

So my problem on my precalculus homework is “Rodney shoots a basket at 6.5ft above the ground. It’s initial velocity is 25 feet per second. How many seconds after shooting does the ball go through...
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11/03/17

#### A penny is thrown from the top of a 28.9-meter building and hits the ground 2.71 seconds after it was thrown. The penny reached its maximum height above the gro

A penny is thrown from the top of a 28.9-meter building and hits the ground 2.71 seconds after it was thrown. The penny reached its maximum height above the ground 0.56 seconds after it was...
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10/30/17

#### Find an nth degree polynomial function with real coefficients satisfying the given conditions

n=3
-2, and -2+3i are zeros
leading coefficient is 1

10/30/17

#### A certain culture initially has 25 bacteria and is observed to double every 5 hours

a) Find an exponential model n(t) = n02t/a for the number of bacteria in the culture after t hours.
b) Estimate the number of bacteria after 18 hours.
c) After how many hours will the bacteria...
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10/30/17

#### After how many days are there only 5 g remaining?

A 15 g sample of radioactive iodine decays in such a way that the mass remaining after t days is given bym(t) = 15e−0.087t, where m(t) is measured in grams.

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