During a hoagie sale fundraiser a ski club sold 42 italian hoagies, and 53 roast beef hoagies. what is the ratio of hoagies sold

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

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?