In need help on this problem plis

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

Sara can take no more than 22 pounds of luggage on a trip.her suitcase weighs 112 ounces.how many more pounds can she pack without going over the limit?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41