Which equation represents a linear function A y = 2x^2, B, y = x^2 + 3, D y = 5x - 1, C, y= 10 + x^2
1 answer:
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Answer:
0.314 gallon is required to cover a circular region with a radius of 40 feet
Step-by-step explanation:
Given
a gallon of paint will cover about 400 square feet in a single coat
To Find:
Number of gallons required to cover a circular region with a radius of 40 feet = ?
Solution:
Step 1: Finding Area of the circular region
The area of the circular region, A =
where r is the radius
Now substituting r = 40 , we get
A =
Step 2: Finding the number of gallons of paint required
To cover 400 sq feet = 1 gallon
so to cover 1 square feet = gallon
Now to cover 125.6 ft we need
=> 0.314 gallon
By the quadratic formula,
Then
Multiply numerator and denominator by the denominator's conjugate: