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3 years ago

7

The diameter of a circle is 20 ft. Find its area in terms of T.

1 answer:

Ksivusya [100]3 years ago

5 0

Answer:

314.2ft^2

Step-by-step explanation:

Given data

Diameter= 20ft

Radius r= 20/2= 10ft

The expression for the area is

A= πr^2

A= 3.142*10^2

A= 3.142*100

A= 314.2ft^2

Hence the area is 314.2ft^2

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Answer:

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Step-by-step explanation:

Quadratic function is given as $f(x) = ax^2 + bx + c$

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Substituting (0, 6):

$6 = a(0)^2 + b(0) + c$

$6 = 0 + 0 + c$

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Now that we know the value of c, let's derive 2 system of equations we would use to solve for a and b simultaneously as follows.

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Substituting (3, 33), and c = 6

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$9 = 3a + b$

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Subtract equation 1 from equation 2 to solve simultaneously for a and b.

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$f(x) = ax^2 + bx + c$

$f(x) = (4)x^2 + (-3)x + 6$

$f(x) = 4x^2 - 3x + 6$

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