What is 4=2x as a improper fraction or integer

Given f(x) = 17-x^2what is the average rate of change in f(x) over the interval [1, 5]?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Ariel is working at a meat packing plant for 5 nights a week. her regular wage is $11 an hour. she earns tine and a half for any overtime hours. this week she worked 9 hours of over time .how much will ariel earn for overtime this week ?