Solve the equation using mental math.
x-1/7=3 4/7 a.2 5/7 b. 3 3/7 c. 3 5/7 d.3 4/7

The head librarian at the library of congress has asked her assistant for an interval estimate of the mean number of books checked out each day. the assistant provides the following interval estimate: from 740 to 920 books per day. what is an efficient, unbiased point estimate of the number of books checked out each day at the library of congress?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

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?