An account grows at an annual interest rate of r , so it grows by a factor of x = 1+ r each year. The function A(x)= 800x^4 + 350x^3 + 500x^2 + 600x gives the amount in the account after 4 years when the growth factor is x. 1) What is the total amount in the account if the interest rate for the account is 3% each year?

Applying the formula, it is found that the total amount in the account will be of $2,431.3.

The amount in the account after 4 years is given by:

In which the growth factor is x = 1 + r, in which r is the interest rate, as a decimal.

In this problem, interest rate of 3%, hence .

Then:

The total amount in the account will be of $2,431.3.

A similar problem is given at link

2431.311498

Step-by-step explanation:

Given the model:

A(x)= 800x^4 + 350x^3 + 500x^2 + 600x

x = growth factor = (1 + rate)

If rate = 3% ; x = (1 +. 3%) = (1 + 0.03 = 1.03

Hence,

A(1.03)= 800(1.03)^4 + 350(1.03)^3 + 500(1.03)^2 + 600(1.03)

= 2431.311498

This is the amount in account after 4 years, if the interest rate is 3% and growth rate = (1 + rate)

answer: all of the odd numbers were opened

the first person was the one that was opening all of the lockers. since one is odd, this causes all of the odd number lockers to be opened in the end.

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x