In a standard normal distribution 95% of the data is within +/- deviations of the mean.
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How do you find the circumfrance of a circle?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Tony is charged $ 50 and additional $0.15 per miles for renting a car. a) represent the cost of renting a car with an equation, and the determine the cost if he drove it70 miles. b) what would be the cost of a car rental if the car was driven 250 miles? show work