The equation a = 640s gives the relationship between s square miles and a acres. Pam owns 7.5 square miles of farmland. How many acres does she own?
A. 480 acres
B. 11.72 acres
C. 4,800 acres
D. 1.17 acres
640 acres / 1 mi^2
7.5 mi^2 (640 acres / 1 mi^2)
= 4,800 acres
note I arranged the conversion factor so it had acres on the top and mi^2 on the bottom
If I wanted to go the other way, from acres to mi^2 I would do it upside down. It is the same top and bottom (640 acres = 1 mi^s)
so all it changes is the language :)
Just do it so the units you do not want cancel. mi^2 * (anythings/mi^2) = anythings
To find the number of acres Pam owns, we can use the equation a = 640s, where a represents the number of acres and s represents the number of square miles.
Given that Pam owns 7.5 square miles of farmland, we can substitute this value into the equation:
a = 640s
a = 640 * 7.5
To solve this equation, simply multiply 640 by 7.5:
a = 4800
Therefore, Pam owns 4800 acres of farmland.
The correct answer is C. 4,800 acres.