A distribution has the five-number summary shown below. What is the interquartile range (IQR) of this distribution?
28, 34, 43, 59, 62

A. 34
B. 25
C. 31
D. 59

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Can someone, me with this. i really need with this

The half-life of a certain material is 0.004 second. approximately how much of a 20-gram sample will be left after 0.016 second? a. 5 grams b. 16 grams c. 0.32 gram d. 1.25 grams