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3 years ago

How many feet of fencing is needed to fence in a 130 ft by 225 ft area?

Mathematics

2 answers:

yaroslaw [1]3 years ago

6 0

You need 710 ft of fencing.

Law Incorporation [45]3 years ago

6 0

So you just want to find the perimeter first.

Perimeter is:

2l + 2w

If l equals to length and w width.

So,

2 * 130 + 2 * 225

260 + 450

710

So the perimeter is 710 feet, so you need 710 feet to fence in a 130 ft by 225 ft area.

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2 years ago

A ball is thrown downward from a cliff. Its position at time t seconds is given by the formula s(t) = 16t2 + 32t, where s is in

Rom4ik [11]

Answer:

It takes 2.8 seconds for the ball to fall 215 ft.

Step-by-step explanation:

We are given a position function s(t) where s stands for the number of feet the ball has fallen, so we have to replace s with the given value of 215 ft and solve for the time t.

Setting up the equation.

The motion equation is given by

$s(t) =16t^2+32t$

We can replace there s = 215 ft to get

$215=16t^2+32t$

Solving for the time t.

From the previous equation we can move all terms in one side to get

$16t^2+32t-215=0$

At this point we can solve for t using quadratic formula.

$t = \cfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

where a, b and c are the coefficients of the quadratic equation

$at^2+bt+c=0$

So we get

$a=16\\b=32\\c=-215$

Replacing on the quadratic formula we get

$t = \cfrac{-32\pm \sqrt{32^2-4(16)(-215)}}{2(16)}$

Using a calculator we get

$t=-4.8 , t = 2.8$

Physically speaking the only result that makes sense is to move forward in time that give us t = 2.8 seconds.

We can conclude that it takes 2.8 seconds for the ball to fall 215 ft.

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2 years ago

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3 years ago

Read 2 more answers

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The area of the hexagon 24a² -18 is equivalent to 6(4a² -3).

Option A is the correct answer.

<h3>What is a Hexagon ?</h3>

A polygon with 6 sides is called a Hexagon.

The area of a hexagon is equal to area of 6 equilateral triangles.

The area of hexagon is given as

24a² -18

6(4a² -3)

Therefore the area of the hexagon 24a² -18 is equivalent to 6(4a² -3).

Option A is the correct answer.

To know more about Hexagon

brainly.com/question/3295271

#SPJ1

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1 year ago

Which method of separation can be used for a homogeneous mixture?

nignag [31]

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3 years ago