Calculating Distances at Sea The navigator of a ship at sea spots two lighthouses that she knows to be 3 miles apart
long a straight seashore. She determines that the angles
Flormed between two line-of-sight observations of the light-
houses and the line from the ship directly to shore are 15°
and 35°. See the illustration.
(a) How far is the ship from lighthouse P?
(b) How far is the ship from lighthouse Q?
(c) How far is the ship from shore?

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?