Find a closed form for sn = 1 *1! +2*2! ++n*n! for integer n> =1 your response should have a factorial.

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

How many glue sticks are in a basket containing 96 scissors, if the ratio of glue sticks to scissors is 19 to 57.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2