It would be $2.6 (or $2.60) per pound.
Looking at the graph, trace your finger up from 10 on the x-axis. You will end up somewhere around 17.
Therefore, the approximate height of the tree after 10 years will be 17 feet.
Answer:

Step-by-step explanation:
We will use the co-function identity for sine, where:

Since sin(21)=0.358=cos(x). This means that:

Solve for x. Add x to both sides:

Subtract 21 from both sides:

Hence:

First of all f(2)=2(2)-5=-1 and f(5)=2(5)-5=5
so
f(2)+f(3)=-1+5=4