Which of the following equations is true? A. 1.8(42.4 - 19.8) = (1.8 × 42.4) + (1.8 × 19.8) B. 1.8(42.4 - 19.8) = (1.8 × 42.4) - (1.8 × 19.8) C. 1.8(42.4 - 19.8) = 44.2 - 21.6 D. 1.8(42.4 - 19.8) = 1.8 - 1.8 × 19.8

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

1. a parachutist is 800 feet above the ground when she opens her parachute. she then falls at a constant rate of 5 feet per second. select the equation that represents this situation. h = -800t + 5 y = -5x + 800 h = 5t - 800 y = 800x + 5 i need