SOLUTION: You start measuring the growth of a tree in your backyard. It’s initial circumference was 80 cm and it grows at a rate of 2 cm every year. This situation can be represented by th

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: You start measuring the growth of a tree in your backyard. It’s initial circumference was 80 cm and it grows at a rate of 2 cm every year. This situation can be represented by th      Log On


   

Question 1169618: You start measuring the growth of a tree in your backyard. It’s initial circumference was 80 cm and it grows at a rate of 2 cm every year. This situation can be represented by the equation C = 80 + 2t
a) What do the C and t represent in this equation



b) What was the circumference of the tree after 7 years?



c) After how many years was the circumference 92 cm?



d) What was the diameter of the tree after 8 years?

Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
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It’s initial circumference was 80 cm and it grows at a rate of 2 cm every year. This situation can be represented by the equation C = 80 + 2t
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That is everything you need.
C, the circumference at any time t in years;
Slope is seen for how many cm's per year;
and the initial size was the constant term.

You only need to know 2pi*r=C for question part (d).