The time required to finish a test is normally distributed with a mean of 60 minutes and a standard deviation of 10 minutes. what is the probability that a student will finish the test between 40 and 70 minutes?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters .

Answer this question, only if you know the answer. 30 points and brainliest!

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?