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melamori03 [73]
2 years ago
11

Solve for r: B=dPIEr^2

Mathematics
1 answer:
lisabon 2012 [21]2 years ago
3 0

Answer:

C

Step-by-step explanation:

So we have the equation:

B=d\pi r^2

And we want to solve for r.

So first, isolate the r variable. Divide both sides by dπ. So:

\frac{B}{d\pi}=\frac{d\pi r^2}{d\pi}

The right side cancels:

\frac{B}{d\pi}=r^2

Take the square root of both sides:

r=\sqrt\frac{B}{d\pi}

We can rearrange the terms:

r=\sqrt\frac{B}{\pi d}

Our answer is C.

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A square playground is surrounded by a sidewalk on all sides. The sidewalk is 2n+3 yards along each side. The sidewalk is 0.5 ya
soldi70 [24.7K]

Answer: It  can be calculated by using the formula of perimeter and by adding four sides

1) Perimeter= 2(L+B)= 8n+12

2) Perimeter= L+L+L+L= 4L= 8n+12

Step-by-step explanation:

As it is a square playground all its sides are equal

Perimeter of the sidewalk = 2(L+B)= 2(2n+3+0.5)= 2(2n+3.5)= 4n+7

Perimeter of the square playground= <em><u>2(L+B)</u></em>= 2(2n+3+2n+3)

<em>2(4n+6)= 8n+12-------------------------A</em>

Perimeter of the square playground<u><em>= L+L+L+L=4L</em></u>  42n+3+2n+3+2n+3+2n+3=<u><em>4(2n+3)= 8n+12------------------------B</em></u>

4 0
3 years ago
A toy train is built with the ratio of the model to the real of 1:30. If the real train is supposed to be 55 feet long, how many
Zigmanuir [339]

Answer:

The answer to your question is 20 in

Step-by-step explanation:

Data

ratio  1 : 30

real length = 55 ft

toy train length = ?

Process

1.- Use ratio and proportions to solve this problem.

                           1 : 30 :: x : 55

solve

                           x = (55 x 1) / 33

Simplification

                           x = 55/33

result

                           x = 1.67 ft

2.- Convert the length to in

                         1 ft ------------------ 12 in

                        1.67 ft --------------   x

                          x = (1.67 x 12) / 1

-Simplification

                          x = 20/1

-Result

                           x = 20 in

4 0
3 years ago
In which quadrant does the point lie? Write the coordinates of the point.
Pie
A,C, and D are in quadrant 3 and C is in quadrant 1
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3 years ago
the drama club held a car wash on Saturday and Sunday. they washed a total of 60 cars.if they washed 40% of the cars on subday,h
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60 x 40%

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Hope this helps. :)

5 0
3 years ago
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Step-by-step explanation:

547      

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8 0
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