Each person in a random sample of 20 students at a particular university was asked whether he or she is registered to vote. The responses (R = registered, N = not registered) are given here: N R R R N N R N N R R N N R R N N N R R Use these data to estimate p, the true proportion of all students at the university who are registered to vote.

Henrik is shopping at a store. the store is having a sale on all items. henrik also has a coupon for an additional amount off the sale price. the expression 0.7p – 15 represents the final price, in dollars, of items with a regular price of p dollars. complete the table by filling in the value of the coupon and the percent discount of the store's sale.