George swam for 56 min and stopped swimming at 7 a. m.
What time did he start swimming?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4