What percentage is equivalent to 4/5

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

1. what is the measure of ∠abc? what is the measure of ∠abd?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is