3 years ago

EXPERT HELP I'LL GIVE BRAINLIEST:

Mathematics

2 answers:

timurjin [86]3 years ago

7 0

Answer:

990, C

Step-by-step explanation:

The formula for the surface area of the bottom cushion is

A = 2wl + 2lh + 2hw (w is width, l is length, h is height)

w = 18, l = 21, h = 3

A = 2(18)(21) + 2(21)(3) + 2(3)(18)

A = 2(378) + 2(63) + 2(54)

A = 756 + 126 + 108

A = 990 (C)

makkiz [27]3 years ago

6 0

The answer is c. credits to the person above me. :]

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