6. The amusement park won't allow kids to ride roller-coasters until they are a minimum of 48
inches tall. Michael is now 42 inches tall, and
grows about 1/2 inch every month. How many
months will it be until Michael can ride a roller-
coaster?

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?