What is use of measuring tape ?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

What is a good example of instantaneous speed