What is the most accurate measurement of 1 pound

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

The function show two sisters' savings account and the rate at which they plan to deposit money

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?