Brianna made a design with chalk on the playground in the shape of a triangle. Two sides of the triangle measuring 5 feet and 8 feet meet at a 40° angle. What is the area of the triangle? Round your answer to the nearest tenth.

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?