To solve for an unknown number, you have to keep isolating it till it is all alone:
A=P(1+rt)
(1+rt)=A/P
rt=A/P -1
r=(A/P-1)/t
Answer:
.
Step-by-step explanation:
We have been given that 4 days I have 140 copies of a book, 9 days I only have 50 left. We are asked to write an equation
, where c is number of copies still on hand and t days being available.
We have two points on line (4,140) and (9,50). Now, we will use these points to find slope as:



Now, we will use point-slope form of equation
and substitute
and coordinates of point (9,50) as:




Therefore, our required equation would be
.
I think it would be D because it started off low then it started to increase
Answer:
Is D
Step-by-step explanation:
Because is moving four times right and four times down.