Arthemeatic sequence

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?

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.