Find the mean of the following data:

9,15,17,18,6,20,8,5,18,18,10,5,14,1 2,10,7

a. 15
b. 12
c. 11
d. 18

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Why is studying fractions important

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.