25 graduating seniors form Stellar High School are randomly selected. A mean GPA of 3.42 is calculated with a margin of error ±0.38 for a 95% confidence interval. What is the interval estimate of the population mean?

A) 2.87 < μ <3.63
B) 3.04 < μ <3.80
C) 3.04 > μ > 3.80
D) 3.06 > μ > 3.78

Answer is B.

Marcus built a model car that is 4 inches wide. what scale was used to build the car if the actual width of the car is 6 feet? a. 1 in. = 2 ftb. 1 in. = 2.5 ftc. 1 in. = 1.5 ftd. 1 ft = 1.5 in.

Barbara's piano instructors house is 7 1/8 miles from her house. after biking for 1 3/4 miles she stops to rest how much longer does she need to bike to reach her instructor's house

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?