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2 years ago

13

Ellen takes a multiple choice quiz that has 5 questions with 4 answers choices for Each question. What is the probability that s

he will get exactly 2 answers correct by guessing?

1 answer:

DedPeter [7]2 years ago

7 0

10%

5*4=20
2/20=1/10
1/10=0.10=10%

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The recursive formula

$a_{n+1} = 5a_n-3$

is telling you that the next term in the sequence is five times the previous one, minus 3.

So, if we start with $a_1=4$ , we have to multiply it by 5 and subtract 3 to get the next:

$a_2 = 5a_1-3 = 5\cdot 4 - 3 = 20-3 = 17$

And similarly we can obtain all the next terms:

$a_3 = 5a_2-3 = 5\cdot 17 - 3 = 85-3 = 82$

$a_4 = 5a_3-3 = 5\cdot 82 - 3 = 410-3 = 407$

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The formula for calculate the area of a rectangle is:

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The area that was convered will be the sum of the areas of all the faces, but the top of the tank.

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