Your lunch bill is $19.75. a 5% sales tax will be added, and you want to give a tip of about 20% of $19.75. estimate how much you will pay for lunch.

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)