Which two ratios form a proportion a) 1/2 and 2/7 b) 2/1 and 7/14 c) 1/2 and 7/14 d) 2/1 and 14/21

1/2 * 2/2  = 2/4  which is not 2/7

2/1 * 7/7 = 14/7  which is not 7/14

1/2 * 7/7 = 7/14 which is 7/14  yes

2/1 * 7/7 = 14/7 which is not 14/21  no

Choice C

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

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8