A.The initial value of the graph is 200. The graph increases by a factor of 1.05 per 1 unit increase in time.
Hi! Use the rule of three;
If 3cm---------50km
then 8.5 cm -------- x km
So;
(8.5 x 50 ) / 3 = 141.67
That means that it is 141.67 km aprox.
The answer is 18, work shown in image attached
To solve this, you need to know the formula to find the circumference of the circle. It is: C=2(pie)r.
C is what you are finding.
Pie is 3.14(you already got that).
R is the radius.
There is not enough information to solve your problem, but I hoped the equation helped!