2 years ago

Please help and show clear instructions will give brainliest !

Mathematics

2 answers:

just olya [345]2 years ago

8 0

3 was the right answer to this

Tems11 [23]2 years ago

3 0

Answer:

Answer is 3 because

Step-by-step explanation:

a=2

20*2= 40

40-1 = 39

b = 13

so 39/13 = 3

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Answer:

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3 years ago

A survey among freshman at a certain university revealed that the number of hours spent studying before final exams was normally

patriot [66]

Answer: 0.0775

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Standard deviation : $\sigma =15$

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For x= 30 hours

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