The annual number of burglaries in a town rose by 50% in 2012 and fell by 10% in 2013. Hence the total number of burglaries increased by 40% over the two­ year period. What is the mistaken assumption here?

Why is that assumption incorrect?

By what percent has the number of burglaries actually changed in the two-year period? show calculation

By what percent would the crime have to decrease in the second year in order for the change over the two-year period to actually be a 40% increase? Round to nearest 10th percent (ex-decimal .05873 is 5.873% to one decimal is 5.9%) show calculation

The correct option is d.

Step-by-step explanation:

Cameron has decided to diversify his investments in the following way:

1. $3,000 in an account earning 2.7% simple interest.

Formula for simple interest:

Where, P is principle, r is rate of interest and t is time.

2. $5,000 in a savings account earning 1.8% interest compounded annually.

Formula for compound interest:

Where, P is principle, r is rate of interest, n is number of periods in a year and t is time.

3. $5,000 in a certificate of deposit earning 3.9% interest compounded quarterly.

The total interest Cameron will earn on his investments at the end of 3 years is

Therefore the correct option is d.