The width w (in centimeters) of a tortoise can be modeled by the function
w= 119 - 77e-0.178t where t is the tortoise's age in years. Graph
this model and use the graph to estimate the width of a tortoise
that is 3 years old. Round your answer to the nearest whole
centimeter
Width =
cm

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?