The book on the table above is not in motion, but is acted upon by a total of four different forces (three of which are shown). If a student is applying a force to the left then force that is NOT shown in the diagram is BEST described as the ] force of gravity ? elastic force from the compression of matter? horizontal force from a pull or push ? force of friction ?

Select all of the following expressions that are equal to 2.5.

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?

Change negative exponents to positive, then solve