Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 66 miles per hour, with a standard deviation of 3 miles per hour. estimate the percent of vehicles whose speeds are between 57 miles per hour and 75 miles per hour. (assume the data set has a bell-shaped distribution.)

answer: 43/157

this is the answer and if you try to prove me wrong your a meanie

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.