What does the a stand for in the r. a.c. e. strategy

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

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?

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?