Your car's back window is in the shape of a trapezoid with the dimensions shown. the 16 -inch window wiper cleans a part of the window in a semicircular pattern. what is the approximate area of the window that is not cleaned by the wiper?

338 squared inches is the approximate area of the window that is not cleaned by the wiper.

Step-by-step explanation:

Area of trapezoid shaped widow: A

Length of the longer side of window= a = 42 inches

Another length of window = b = 32 inches

height of the window = h = 20 inch

Area of trapezoid =

Area of the semicircle  = A'

Radius of the circle = r = 16 inch

Area of the semi-circle =

Area of the window left uncleaned :

= A - A' =

338 squared inches is the approximate area of the window that is not cleaned by the wiper.

europa2433

europa2433

step-by-step explanation:

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1