1. Compare the grades on a final math test of 25 students who use calculators and 25 students who do not use calculators . The students decide which group they are in.

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

Suppose a gym membership has an initial enrollment fee of $75 and then a fee of $29 a month. which equation models the cost, c, of the gym membership for m months?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read