Randi and Leah are studying together for an exam. Let X represent the number of hours Randi spends studying nightly, and let y represent the number of hours Leah spends studying nightly. The mean of X is 4.5 hours with a
standard deviation of 1.1 hours, and the mean of Yis 3.7 hours with a standard deviation of 1.8 hours Assuming
these are independent random variables which answer choice correctly calculates and interprets the standard
deviation of the sum, S = X+Y?

Over the last 4 seconds, a snail has traveled 4/9 of an inch. if the snail traveled the same distance each second, how far did it travel each second?

Going from point a to point b, the cheetah traveled at an average rate of 70 mph. returning to point a, the cheetah traveled at an average rate of 40 mph. can we say that this cheetah’s average rate was 55 mph? uchet write an equation for the average rate for the trip. remember, the cheetah runs from point a to point b and back to point a. first leg of trip: second leg of trip: ⦁ the following equation represents the average rate for the trip. is this equation equivalent to the one you wrote above? explain why or why not.

If the figures below are similar give the scale factor of figure a to figure b