Question

For the following table, compute the area of a 510 square foot shed left to paint if you paint 60 square feet a day. What kind of decay is this?

Answer 1

$\begin{gathered} \text{Area}=510ft^2 \\ 60ft^2\text{ per day} \\ \text{Day 1} \\ Area\text{ left =}510ft^2-60ft^2 \\ Area\text{ left =}450ft^2 \\ \text{Day 2} \\ Area\text{ left =}450ft^2-60ft^2 \\ Area\text{ left =}390ft^2 \\ \text{Day 3} \\ Area\text{ left =}390ft^2-60ft^2 \\ Area\text{ left =}330ft^2 \\ Day\text{ 4} \\ Area\text{ left =}330ft^2-60ft^2 \\ Area\text{ left =}270ft^2 \\ Day\text{ 5} \\ Area\text{ left =}270ft^2-60ft^2 \\ Area\text{ left =}210ft^2 \\ It\text{ is a linear decay} \end{gathered}$