i’ll mark brainiest!! how do u get the rate of change for #2? and what’s the greatest rate of change out of all of them?

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in

Four quarts of a latex enamel paint will cover about 200 square feet of wall surface. how many quarts are needed to cover 98 square feet of kitchen wall and 52 square feet of bathroom wall

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.