Can someone help me please on both for brilliant

The level of co2 emissions, f(x), in metric tons, from the town of fairfax x years after they started recording is shown in the table below. x 2 4 6 8 10 f(x) 26,460 29,172.15 32,162.29 35,458.93 39,093.47 select the true statement.

Can someone me out here number 4 plz

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.