Richard has two circular sprinklers to water his rectangular backyard, as shown.

(Richards Backyard is in the Picture)

The backyard has an area of 512 square feet.

In the first response box, enter an expression using r that represents the
exact area, in square feet, of Richard's backyard that is not watered.

In the second response box, enter the area, in square feet, of Richard's
backyard that is not watered. Round your answer to the nearest hundredth.

you need to add a picture

answer: answer is b.

[m < b = 120º]

step-by-step explanation:

55.44 inches

step-by-step explanation:

part a. assuming a perfectly linear relationship, we can find the slope from the first two data points.

slope = m = (change in rainfall)/(change in years)

= (61.80 -62.33)/(2005 -2004) = -0.53/1 = -0.53

then the point-slope form of the equation of the line can be written as

y = m(x -h) +k . . . . . m = -0.53, (h, k) = (0, 62.33)

y = -0.53x +62.33 . . . x = years after 2004

part b. in 2017, x = 2017 -2004 = 13. then the predicted rainfall is

y = -0.53·13 +62.33 = 55.44 . . inches

the predicted rainfall in 2017 is 55.44 in.