Afair owner made 18 dollars when a group of 3 people entered which is a rate of dollar per person

Write 17/20 as a decimal and as a percent.

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be bale to prepare using the sauce?