Alejandro weighs 37 pounds and sits on a seasaw 2 feet away from its center. if his brother marco sits on the seasaw 3 feet away from the center and the seasaw is balanced, how many pounds does marco weigh? if necessary, round your answer to the nearest tenth of a pound.
a. set up a proportion.
b. solve, showing your work, and write your answer in a complete sentence to answer the question being asked (rounding appropriately).

Which expression is equivalent to 2^4y^3

The graph below shows the amount of money left in the school’s desk fund, f, after d desks have been purchased. for each new desk that is purchased, by how much does the amount of money left in the school’s desk fund decrease?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.