In which number does the digit 8 have a value that is 1/10 times as great as the digit 8 in the number 2,980.7

a 389.3
b 3,023.8
c 548
d 8,659

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.

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

Complete the equation of the live through (-1,6) (7,-2)