A cylinder of radius r cm and height h cm has a curved surface area A cm². Where –
a) We are asked to find formula for h.
First, overturn the equation
Divide both sides by 2πr
b) Again, we are given –
⠀⠀⠀━━━━━━━━━━━━━━━━━━━━━━━━━━
Answer:
This is the same as writing y = 650(0.907)^t
=====================================================
Explanation:
Exponential equations can be of the form y = a*b^t
In this case, we have
If we had exponential growth, then we'd compute 1 + 0.093 instead.
Based on those values, we go from y = a*b^t to y = 650(0.907)^t which is the same as writing
Other exponential forms are possible, but I think this form is the most intuitive. The 0.907 means that 90.7% of the sample remains after each year.