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3 years ago

8

The talk-time battery life of a group of cell phone is normally distributed with a mean of 5 hours and a standard deviation of 1

5 minutes. A) What percent of the phones have a battery life of at least 4 hours and 45 minutes?

1 answer:

kiruha [24]3 years ago

6 0

The correct answer is 84%

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lozanna [386]

Answer:

This might be the answer not sure

Step-by-step explanation:

if it goes down 0.8 % every year it would be 1392

this is what I did 1,450−0.8%−0.8%−0.8%−0.8%

−0.8% I did -0.8% for every year i did 5 times for 5 years

so that the value but if u want the really accurate one then the answer is 1,392.9206056485 i hate myself for doing that but yeah thats it

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3 years ago

What’s the approximate value of x?

drek231 [11]

Answer:

Option C: 4

Step-by-step explanation:

<u>Use the Pythagorean Theorem:</u>

$a^2+b^2=c^2$

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$9+b^2=25$

$b^2=16$

$b=4$

Therefore, the value of x is 4.

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Step-by-step explanation:

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Step-by-step explanation:

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