16 x 8 = 128 square feet (area of rectangle)

shaded:
8 x 2 = 16
10 x 1 = 10
1/2 (3)(10) = 15

total shaded area: 16+10+15 = 41 square feet
total non-shaded area = 128 - 41 = 87 square feet

answer

area of the shaded region = 41 square feet
area of the non - shaded region = 87 square feet

5 0

3 years ago

Use f(x)=1/2x and f^-1(x)=2x to solve the problems f^1(-2), f(-4), f(f^-1(-2)?

neonofarm [45]

F^1(-2) = 2(-2) = -4
f(-4) = 1/2 * -4 = -2

f(f^-1(x)) = x so answer is -2

8 0

3 years ago

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What is the equation of a circle centered at the origin with radius 20.. i cant find the answer and i even tried?

KIM [24]

General equation of a circle with centre (h, k) is given by:

$(x - h)^{2} + (y - k)^{2} = r^{2}$

Now, the origin is the centre and radius is 20, so substituting these points in yields:
$x^{2} + y^{2} = 20^{2}$
$x^{2} + y^{2} = 400$

4 0

3 years ago

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