The photo shows a small coin. The scale of the actual coin to the photo is 8 mm mm to 2 cm. In the photo, the distance across the coin is 3.25 CM. What is the distance across the actual coin? Show your work

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?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=