Which is the cosine ratio of ∠A? ACB is right angle triangle. The length of AC is 28, the length of CB is 195, and the length of AB is 197.

A. 195197
B. 28197
C. 28195
D. 19528

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?

Roy has 4 1/2 pizzas for the soccer team to split after the game. if each member is going to get 1/2 of a pizza, how many players are on the soccer team

Asmall book publisher knows that 26 books weigh 41 lbs. how much do 40 books weigh?