Question

Use the rule of 70 to approximate the growth rate when the doubling time is:

a. 5740 years
Round the answer to three decimal places.
Growth rate: _______% per year

b. 4 seconds

Enter the exact answer.

Growth rate: _____% per second

Answer 1

The rule of 70 says that
\[ \text{Doubling Time} \approx \frac{70}{\text{Growth Rate}} \]
Or, for you,
\[\text{Growth Rate} \approx \frac{70}{\text{Doubling Time}} \]
Where the doubling time is measured in years.

Answer 2

so would that be....

G.Rate = 70/5740
G.Rate then would equal =1.29%

Answer 3

and G.Rate = 70/4=17.5?

Answer 4

????

Answer 5

@Mertsj , @Luis_Rivera ,@Zarkon ,@jim_thompson5910
May you help ?

Answer 6

Did you change the 4 seconds to years?

Answer 7

I do not know how to do that....

Answer 8

Would I still use the formula that they first gave me? the

Growth Rate = 70/doubling time?

Answer 9

and for the first one it should be more easier right since its already in years?
but we want the growth percentage though..

Answer 10

how do i convert the 551, 880,000 into a %?

Answer 11

I just reread the problem. Scratch that because it says they want the growth rate per second.

Answer 12

oh okay thats fine...

Answer 13

Mertsj?