A fire covers 420 acres and continues to spread at a rate of 60 acres per day. How many total acres will be covered in the next 2 days?

spread-at-a-rate

#1

A fire covers 420 acres and continues to spread at a rate of 60 acres per day. How many total acres will be covered in the next 2 days?
Write an expression for the total area covered by the fire in d days
The firefighters estimate that they can put out the fire at a rate of 80 acres per day. Write an expression for the total of area that the firefighters can put out in d days.
Set the expression in parts b and c equal. Solve for d. What do do represntt

Answer:

a. 120
b. 420 + 60d
c. 80d
d. 80d = 420 + 60d
20d = 420
d=21
How many days it will take the firefighters to put out the fire