Brad is testing whether school is more enjoyable when students are making high grades. he asked 110 students if they enjoyed school and whether their gpa was above or below 3.5. he found that 38 of the 45 students with a gpa above 3.5 reported that they enjoyed school, and 7 of the 65 students with a gpa below 3.5 reported that they enjoyed school. what is the probability that a student with a gpa below 3.5 does not enjoy school?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?