Match the addition and subtraction problems to their solutions: __5/7-3/7 a. 1/24 __1/6+3/6 b. 2/7 __1/2+1/4 c. 2/3 __1/5+1/2 d. 7/10 __1/6-1/8 e. 3/4

5/7 - 3/7 = 2/7   B

1/6 + 3/6 = 4/6 = 2/3   C

1/2 + 1/4 = 2/4+ 1/4 = 3/4    E

1/5 + 1/2 = 2/10 +5/10 = 7/10  D

1/6 - 1/8 = 4/24 - 3/24 = 1/24  A

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

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