5.Express 30 minutes to 2 hours in ratio. 6.Express each as ratio in the simplest form.:
a)15 balloons out of 60 balloons.
b)8 cups out of 36 cups.
7.A pattern has 14 blue triangles to every 18 yellow triangles. What is the ratio of yellow triangles to blue triangles?
8.Noah drew 22 hearts and 76 circles. What is the ratio of circles to all shapes?
9.Fill in the following blanks:
a) 1:3=__:6=3:__.
10.Write it as in ascending order:
a)1:2, 3:5,3:10,3:2,4:5

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?