Please solve these 3 questions

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?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?