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irina1246 [14]
3 years ago
7

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.

Mathematics
1 answer:
katrin2010 [14]3 years ago
4 0

Answer:

A=920 ft.

Step-by-step explanation:

Using the formulas

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

AB=s(s﹣a)(s﹣b)(s﹣c)

s=a+b+c

2

Solving for A

A=ah+bh+ch+1

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

2·﹣84+2·(8·17)2+2·(8·15)2﹣174+2·(17·15)2﹣154=920

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A box contains three plain pencils and 5 pens. A second box contains three colored pencils and three crayons. One item from each
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Answer:

Therefore the probability that a pen from the first box and a crayon from the second box are selected is \frac5{16}

Step-by-step explanation:

Probability:

The ratio of the number of favorable outcomes to the number all possible outcomes of the event.

Probability=\frac{\textrm{The number favorable outcomes}}{\textrm{The number all possible}}

Given that,

Three plain pencils and 5 pens are contained by the first box.

Total number of pens and pencils is =(3+5)=8

The probability that a pen is selected from the first box is

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=\frac{\textrm{The number pens}}{\textrm{Total number of pens and pencils}}

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Total number of pencils and crayons is =(3+3)=6

The probability that a crayon is selected from the second box is

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=\frac{\textrm{The number of crayon}}{\textrm{Total number of crayons and pencils}}

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Since both events are mutually independent.

The required probability is multiple of the events

Therefore the required probability is

=\frac58\times \frac36

=\frac5{16}

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3 years ago
Michael purchased a new office computer system on January 23, 2018, at a cost of $3,791. He does not want to claim bonus depreci
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