The total amount of money in a savings account after t years is given by the function a=1000(1.031)^t . how could this function be rewritten to identify the monthly interest rate? what is the approximate monthly interest rate?

A = 1000 ( 1 + .031/12) ^(12t)

The approximate monthly interest rate is .2583 percent

Step-by-step explanation:

A=1000(1.031)^t

The formula for compound interest is given by

A = P(1 + r/n) ^ (nt)    

Take 1.031 and subtract 1

.031 is the yearly rate in decimal form

A = 1000 ( 1 + .031/12) ^(12t)

Change to a percent = 3.1 %

Divide by 12

3.1/12 = .2583333333(repeating)  %

This would be the monthly rate

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.