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marta [7]
3 years ago
14

A rectangular prism is 9.8 inches long, 20 inches wide, and 5 inches high. what is the surface area of the rectangular prism?

Mathematics
1 answer:
Sliva [168]3 years ago
3 0
The prism has 6 faces: 2(length·width), 2(length·heighth), & 2(width·heighth)
2(length · width) = 2(9.8 · 20) = 2(196) = 392 in²
2(length · heighth) = 2(9.8 · 5) = 2(49) = 98 in²
2(width · heighth) = 2(20 · 5) = 2(100) = 200 in²

The sum of the faces is the surface area (S.A.)
 392 in² + 98 in² + 200 in² = 690 in²






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strojnjashka [21]

Answer:

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3 years ago
Please help! 30 points ((:
KiRa [710]

Hello from MrBillDoesMath!

Answer:

a = 2.7

Discussion:

(2/3) ( 6a + 9 )  = 16.8         => the Distributive law

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4a              + 6         = 16.8   => subtract 6 from both sides

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a  = 10.8/4

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Thank you,

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4 0
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vesna_86 [32]

Answer:

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