Which of the following sets of ordered pairs does represent as a function of x? a) {(4,2), (3,-5), (5,-5), (1,10)}

b) {(-1,2), (3,5), (5,5), (-1,5)}

c) {(1,2), (3,5), (5,7), (3,10)}

d) {(1,1), (3,1), (5,1), (5,11)}

126.66 m²

step-by-step explanation:

the pertinent area formula is a = πr², where r is the radius.

here, a = π(6.35 m)² = 40.32π, or approximately 126.66 m²

the radius is 2 times the diameter.

step-by-step explanation:

the answer is c 150

step-by-step explanation:

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.