What is the degree measure of an arc 471 ft. long in a circle of radius 10 ft.?

Match each expression with its simplified form.

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Could someone with number 1 and 2