Addition is needed because of the subtraction sign.
The equation will be A sub n=6 ×(2)^n-1
or y=6×(2)^x-1
You're looking for an inequality of the form , or , or .
Start with
Notice that 375º is the midpoint of this interval of temperatures. If we subtract all sides by 375º, then we get
so we can set and , and we can rewrite this inequality in terms of absolute values as
Johnathan will need to paint 1,962.5 square feet.
d = 50^r = 25 A = 2
A = (25)2
A = (3.14)(625) A = 1,962.5