The grades on the last history exam had a mean of 75%. Assume the population of grades on history exams is known to be normally distributed with a standard deviation of 7. What percent of students earn a score between 70% and 82%?

What two numbers add up to 13 but multiply to 36

Convert the following fraction to a decimal and then to a percent. round the decimal to three places before converting to percent. 9/10 0.09: 9% 0.90; 90% 0.90; 9% 0.09; 90% user: find the following quantity. 6% of 124 = 7.44 0.744 74.4 744

Emma is debating whether to use a straightedge and compass or a computer drawing program to complete a construction of a square inscribed in a circle. Which method do you think would take the longest to complete the construction and why?

In a certain lottery, three white balls are drawn (at random) from ten balls numbered from 1 to 10, and one red SuperBall is drawn (at random) from ten balls numbered from 11 to 20.

Simplify (2.1m - 5.2) + (3.7m - 6.4)

How many five-letter codes can be made if no letter can be used twice? (There are 26 letters in the alphabet.)

How to prove using basic definitions, If xy=xz then y=z

Some species of hummingbirds appear to hover in mid-air by flapping their tiny wings 85 times per second. How many times do their wings flap in one minute?

The area of a square is 25 square units how many units is a diagonal of the square

If there are a number of different sounds being produced simultaneously, the resulting intensity is the sum of the individual intensities. How many decibels louder is the sound of quintuplets crying than the sound of one baby crying?