You can run 80 yards in 20 seconds, how many yards
can you run in 48 seconds

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.

Is this a polynomial function? i need to know asap

What is the value of x when x + 7 = 21?