Which ratios form a proportion?

a.4/9 and 9/4
b4/11 and 6/13
c.4/10 and 10/25
d.3/5 and 9/25

Step-by-step explanation:

(A)

When cross multiply the fractions, we get

⇒ 4 × 4 = 9 × 9

⇒ 16 ≠ 36

So,  do not form a proportion.

(B)

When cross multiply the fractions, we get

⇒ 4 × 13 = 6 × 11

⇒ 52 ≠ 66

So,  do not form a proportion.

(C)

When cross multiply the fractions, we get

⇒ 4 × 25 = 10 × 10

⇒ 100 = 100

So,  form a proportion.

(D)

When cross multiply the fractions, we get

⇒ 3 × 25 = 9 × 5

⇒ 75 ≠ 45

So,  do not form a proportion.

$35.59 in pounds

step-by-step explanation: