M is a negative number. Which statement is correct?
Choose only one answer.
A. m + 9 is always positive
B. m + 9 is always negative
C. m + 9 cannot be zero
D. m + 9 could be positive or negative or zero

Amanufacturer knows that their items have a normally distributed lifespan, with a mean if 9.1 years, and standard deviation of 2.9 years. if you randomly purchase one item, what is the probability it will last longer than 10 years?