Is y=3x^2+5 linear or non-linear? Explain why or why not.
The first correct one gets brainliest

This is not linear.

Step-by-step explanation:

A linear equation is one that is dependant on a constant rate of change and variables are raised only to the first power. Here the variable x is raised to the second, so it would not be linear.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6