Alfonse and Melinda are taking a drive in a certain country. They know that a speed of 100 kilometers per hour is approximately equal to 62 miles per hour. They are now driving on a road that has a speed limit of 75 kilometers per hour. How many miles per hour is the speed limit?

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

How many grams the dog will eat in 3 days?