Which expressions represent exponential decay? Check all that apply.

900(0.05)t
700(0.9)x
53(1.75)(0.3)x
90(1.2)t
300(2.4)(1.2)y
2x2 + 9
18 – 3y
PLZ HURRY URGENT!

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement

The anwser cause i do not understand just plez