roblem 3) The life length of light bulbs manufactured by a company is normally distributed with a mean of 1000 hours and a standard deviation of 200 hours. a) What life length in hours is exceeded by 97.5% of the light bulbs

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation:

lo98765432wqasdfghjkloi87654567890

step-by-step explanation: