Apopulation of rodents increases exponentially at a rate of 7.5% per year. what is the equivalent monthly rate to the nearest hundredth of a percent? 0.03% 0.60% 0.62% 0.81% a population of butterflies decreases exponentially at a rate of 18.3% per year. what is the equivalent monthly rate to the nearest hundredth of a percent? 1.27% 1.41% 1.53% 1.67%

1. the answer is "0.62%".
We can calculate this as;
Rate =  7.5% per year
there are 12 months in a year so,
= 7.5/ 100 x 1/12 
=0.075 x 1/12
= 0.00625
for percentage multiply it with 100,
= 0.00625 x 100 
=0.625% = 0.62%
2.the answer is "1.53%".
We can calculate this as;
Rate =  18.3% per year
there are 12 months in a year so,
= 18.3/ 100 x 1/12 
=0.183 x 1/12
= 0.01525
for percentage multiply it with 100,
= 0.01525 x 100 
=1.525% = 1.53%