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PLEASE HELP! I WILL GIVE BRAINLYEST TO WHOEVER ANSWERS FIRST! PLEASE PLEASE BE QUICK! thank you! and please include explanation cause i need to learn to do it for my other problems! THANK YOU!!!!

Find the surface area of the prism.

PLEASE HELP I WILL GIVE BRAINLYEST TO WHOEVER ANSWERS FIRST PLEASE PLEASE BE QUICK thank you and please include explanation cause i need to learn to do it for m class=

Respuesta :

hareesthebeast7

Answer:

A=920 ft.

Step-by-step explanation:

Using the formulas

A=2AB+(a+b+c)h

AB=s(sļ¹£a)(sļ¹£b)(sļ¹£c)

s=a+b+c

2

Solving for A

A=ah+bh+ch+1

2ļ¹£a4+2(ab)2+2(ac)2ļ¹£b4+2(bc)2ļ¹£c4=8Ā·20+17Ā·20+15Ā·20+1

2Ā·ļ¹£84+2Ā·(8Ā·17)2+2Ā·(8Ā·15)2ļ¹£174+2Ā·(17Ā·15)2ļ¹£154=920

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