During the first second of take off a rocket travelled 208 km in 50 mins at a constant rate suppose a penny is dropped from a skyscraper and could travel 153 km in 1/2 an hour at a constant rate which of these have a faster unit rate per hour ? how much faster?

Me. i can't figure out this question. give an explanation too. .

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.

Find the common ratio of the sequence. -4, 8, -16, 32, a: -12b: -2c: 12d: -1/-2