How much of the annual rainfall in the United States becomes runoff on average? 10 percent 50 percent 90 percent 33 percent

In a more natural or undeveloped area, the direct runoff would be considerably less. In the United States, an average of some 70 percent of the annual precipitation returns to the atmosphere by evaporation from land and water surfaces and by transpiration from vegetation.

Explanation:

33%

Explanation:Because although it rains quite a lot but 90 percent means it rains at almost all hours of the day, 50 percent means it rains 182.5 days of the year and 10 percent is way too low because we would be in a water drought if it rained that little, and all the plants would be dead

The correct answer option is tan x and cot x.

Step-by-step explanation:

We are given the following functions and we are to determine whether which of them have a range of all real numbers:

Range is the values of y which a function can take so range of tan x and cot x are all real numbers.

Period of tan x and cot x is .