Answer:
The balance in the account after 20 years will be $11280.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:
.
In this problem
We want to find T, when 
The first step is find the earnings due to interest. So

Adding to the principal to find the balance

The balance in the account after 20 years will be $11280.
Answer:
a)The integers could be : -3 and 2
-4 and 3
-5 and 4
-9 and 10
--------------
b) the integers could be any pair -(x+1) and x with x a natural number
Step-by-step explanation:
The value of x is all real numbers because 6^0 is 1 and 1 raised to the power of any number will still be 1.
Answer:

Step-by-step explanation:
The area of a circle is given by
where
is the radius of the circle. The diameter is given as
feet, so the radius of this circle is
feet.
Plugging in our values, we get:
.