HELP PLEAASE (no fake answers pleassee)

1. A T-Shirt costs $14 without tax costs $14.98 with tax. What is the sales tax percentage?

2. a car that costs $14,000 without tax costs $14,700 with tax. What is the sales tax percent?

3. Identify the constant of proportionality in each solution.
a. the temperature rises 4 degrees each hour for 10 hours.
b. two-thirds of the floats in the parade have flowers.

4. rewrite each algebraic expression with fewer terms.
a. 9.5(a+4)-a
b. 8+h-2x5