Ateacher gives a test to a large group of students. the results are closely approximated by a normal curve. the mean is 74, with a standard deviation of 8. the teacher wishes to give a's to the top 8% of the students and f's to the bottom 8%. a grade of b is given to the next 16%, with d's given similarly. all other students get c's. find the bottom cutoff for a grade of c.

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Someone answer asap for ! a discount store’s prices are 25% lower than department store prices. the function c(x) = 0.75x can be used to determine the cost c, in dollars, of an item, where x is the department store price, in dollars. if the item has not sold in one month, the discount store takes an additional 20% off the discounted price and an additional $5 off the total purchase. the function d(y) = 0.80y - 5 can be used to find d, the cost, in dollars, of an item that has not been sold for a month, where y is the discount store price, in dollars. create a function d(c(x)) that represents the final price of an item when a costumer buys an item that has been in the discount store for a month. d(c(x)) =

Combine like terms to make a simpler expression 3z+z