Find the approximate area of the shaded region below, consisting of a square wya circle cut out of it

What is 20+(5 x 2/5 )+ 3 show your work

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?