12-(12 divided by z) make sure divided by is not in words :)hope it helped
Answer:

multiply either sides by 3:

divide either sides by πr² :

Answer:
Distance Maria had to walk in the afternoon is 
Step-by-step explanation:
Lets take that Maria walked
miles in the afternoon.
Distance walked in the morning + distance walked in the afternoon = 
⇒







The effective rate is calculated in the following way:

where r is the effective annual rate, i the interest rate, and n the number of compounding periods per year (for example, 12 for monthly compounding).
our compounding period is 2 since the bank pays us semiannually(two times per year) and our interest rate is 8%
so lets plug in numbers: