Answer:
615.75
Step-by-step explanation:
you divide 87.92 by pi (3.14 in this case) to get diameter, which you divide by 2 to get the radius to solve for area which you get 615.75
17.8
All you have to do is 8.9 x 2 = 17.8
HOPE HIS HELPS
0.44444444444
(x - 10)(x + 10)
x² - 100 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
Hence
x² - 100
= x² - 10² = (x - 10)(x + 10)
