Suppose compact fluorescent light bulbs last, on average, 10,000 hours. The standard deviation is 500 hours. What percent of light bulbs burn out within 11,000 hours?

How do you show your work for this problem. I dont know how to solve it.

How to figure out slope intercept form but its all mixed up like this for example y - 3x = 19

Sharon, Mark, Beverly and Bruce each work as a doctor, lawyer, teacher or farmer. From the clues below, decide who is the farmer? 1. Mark is not a teacher or a farmer. 2. Beverly is either a teacher or a doctor. 3. Bruce is not a lawyer or a farmer.

The table shows the number of hours that a grouped of students spent studying for the SAT during their first week of preparation. The students each add 4 hours to their study times in the second week.

Kail Ryans 10 laps around the track each day each lap around the track is 400 m meters how many times around the track will she need to run a total of 12 kilometers

Will it be better to use 20% off ten 20$

How to i make this number sentence correct with adding parenthesis? 4² + (-3) - (-5) * 2 = 20

Are the ratios 5:15 and 1:3 equivalent

Find a rational number halfway in between the two numbers 7/8 and 2/7

Bag a contains 7x counters bag b contains 2x counters Five counters are taken from bag a and put in bag b

Angela and Doreen each want to buy the same comb. Angela still needs 58 cents to buy a comb and Doreen still needs 6 cents. If they want to combine their money, they still do not have enough. What is the most the comb could cost?