The tennis match ended at 5:10 P. M. and took 55 minutes to complete. What time did the tennis match start?

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

What is the number 321,000,000 in scientific notation? also what is the number? ?

What is the inverse of the function f(x) = 2x + 1?