circumference = PI x D
circumference is given as 27 inches
so 27 = PI x D
27=3.14xD
so D=27/3.14 = 8.598,
radius = (1/2)D = 4.30 inches
Answer:Average rate of change = -112
Explanation:The average rate of change =

where:
b is the upper limit = 2
f(b) = f(2) = -14(2+4)² - 8 = -512
a is the lower limit = -2
f(a) = f(-2) = -14(-2+4)² - 8 = -64
Substitute with these values in the above equation to get the average rate of change as follows:
average rate of change =

Hope this helps :)
18x-8x2=0
Two solutions were found :
x = 9/4 = 2.250
x = 0
Step by step solution :
Step 1 :
Equation at the end of step 1 :
18x - 23x2 = 0