Please help Pre-calc

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?

Choose the correct translation for the following statement. it is at most ten. x< 10 x< 10 x> 10 x> 10