What is 80% of 80?!? Pls help ASAP

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

If f(x) = -2x2 - 3 and g(x) = 3x - 4, then f(g(2))=

Ineed asap solve. 2a + 4 > 12 a) {a | a > 2} b) {a | a > 4} c) {a | a > 8} d) {a | a > 10}