What is the range of the given function? a) {(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}
b) {x | x = –5, –4, –2, 0, 2} {y | y = –9, –3, 0, 5, 7}
c) {x | x = –9, –5, –4, –3, –2, 0, 2, 5, 7}
d) {y | y = –9, –5, –4, –3, –2, 0, 2, 5, 7}.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Jack is considering a list of features and fees for current bank: jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements? a. $44 b. $104 c. $144 d. $176

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?