Aworld class barrel racing champion wants to build a custom practice area. she wants to keep a perimeter of 200ft. express the area a(l) for a rectangle with this perimeter.

Step-by-step explanation:

Area and Perimeter of a Rectangle

A rectangle is a four-sided shape where each pair of opposite sides have the same length and all the internal angles are 90°. The area of a rectangle with sides b and h is

The perimeter is the sum of all 4 sides

We know the perimeter of the rectangle is 200 feet, thus

Or, equivalently

Replacing b in the formula for the area, we have

For example, if h=30, the area is

A=100*30-30^2=3000-900=2100

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step-by-step explanation:

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answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,