I need to know if 198 to 1287 and 2 to 13 are equivalent ratios

yes they are equivalent

Step-by-step explanation: try dividing 198 and 1287 and the same to 2 and 13 you should get the same for both.

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation:

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )