1. Which expression matches the statement “the difference of 75 and 25 divided between 5 groups”? A. 75 - 25 5
B. 75 + 25 5

C. (75 - 25) 5
D. (75 x 25) 5

2.Solve the following expressions and explain the steps you used to arrive at your answer. Use PEMDAS to help you with your explanation.
10² + {4 – [(6 x 2) ÷ 4]} x 3

3. Select the statement that describes the expression.
A. The quotient of 9 and 63 added to 15
B. Divide 63 by 9, and then add 15.
C. 63 divided by the sum of 9 and 15
D. The sum of 9 and 15 divided by 63

4. Which expression represents the following phrase?
Divide 12 by 6, then add 7

5. Create an expression that has a value of 12. You must use parentheses and at least three numbers in your expression.

Thank You all.

An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb. the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.