HELP PLEASE ASAP What is the initial value of the exponential function represented by the table

A 1/8
B 1/4
C 1/2
D 1

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 33 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30 ∘c on monday, but decreased at a constant rate in the next 33 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.