A coastline recedes at a rate of 3cm per year. How much of the coastline dissappears after 4 years?

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

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

Ineed me i stuck and i don’t want to get it wrong