What is the domain and range

How do you convert 1.27 to a percentage

Scrub a dub toothbrushes are $4.00 each. there is a 10% discount, but there is also a 6% sales tax after the discount is applied. what is the new price after tax? round to the nearest penny

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?