Ethan is planning to drive from boston to atlanta. he measured a distance of 6 7/ 8 inches between the two cities on the national map in his road atlas. a scale of 1 inch: 160 miles is displayed on this map. what does this scale mean? i will mark you brainlist i need asap

And explain how you got it so i can understand future problems : 3

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?

Simplify the algebraic expression 8y-2(y+4)