3 years ago

If Stacy brought 150 apples and gave 6 to each of her 4 friends, how much will she have left?

Mathematics

1 answer:

o-na [289]3 years ago

5 0

The answer is 126 because you multiply 6 times 4 which equals 24 and subtract that from 150 so 150-24 = 126

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A company installs 5,000 light bulbs. the lifetimes of the lightbulbs are approximately normally distributed with a mean of 500

Sergio039 [100]

First, determine the z-score of 675.
z = (675 - 500) / 100 = 1.75
The z-score of 500 is,
z = 0.
Subtracting the z-scores will give us 1.75. This is equal to 0.9599.
= 0.9599 - 0.5 = 0.4599
Multiplying this to the given number of light bulbs,
n = 0.4599 x 5000 = 2299.5
Therefore, there is approximately 2300 light bulbs expected to last between 500 to 675 hours.

5 0

2 years ago

I need your help broskis

Ilia_Sergeevich [38]

a very fast way to do it:

Trivially 8.8*5>10, so the power of 10 is 6+2+1 = 9.

Therefore, the answer is $\boxed{4.4 \text{ x }10^9}$