In a recent study of animal sleep times at the zoo, the mean amount of sleep per night is 6.3 hours with a standard deviation of 2.1. If 23 animals are selected, find the probability that the mean sleep time per night is greater than 8 hours.

Dominic and Terrell plan to start their weekend backpacking trip on Friday at 4:20 P. M, and return home on Sunday at 5:40 A. M. How many days, hours, and minutes are they planning for the trip to last?

Find the percent change in price a. a prices increases from $12 to $15 and b. a price descreases from $20 to $12

Charlie runs at a speed of 3 yards per second. about how many miles does Charlie run

Multiply the following using the vertical multiplication method: x2 + 5x + 1 x 3x2 - 2x + 4

A hexagon is graphed on a coordinate grid and then translated 4 units to the right and 3 units up. If one of the vertices of the original hexagon is located at (9,2), what is the ordered pair of this vertex of the new hexagon after the translation?

The formula for the perimeter of a rectangle is P = 2l + 2w, where P is the perimeter, l is the length, and w is the width. Solve for w.

Which type of statement has the form " if A, then B"?

Fine two consecutive even integers such that twice the smaller is 26 more than the larger.

The ratio of zebras to elephants at the zoo is 6:5. The ratio of Gorillaz two zeros is 7:2. There are 30 zebras at the zoo. How many elephants are there? How many gorillas are there

A telephone number consists of seven digits, the first three representing the exchange. how many different telephone numbers are possible within the 537 exchange? the answer is.