Question

Jacy has $1,000 to invest in a fund that paysapproximately 4.6% per year or in a savings accountwith an annual interest rate of 1.8%. Writepolynomial function S(x) to represent the interestJacy will earn in I year by investing x dollars in thefund and the remainder in the savings account.

Answer 1

The amount of money she will have after t years will be:

Given that:

A fund rate: 4.6% = 0.046

Saving account rate: 1.8% = 0.018

Let x is the amount Jacy invest in the fund so (1000-x) is the amount he invests in the savings account​

So a polynomial function S(x) to represent the interest Jacy will earn in 1 year is:

S(x) = 0.046x + 0.018(1000-x)

so we can simplify it as:

S(x) = 0.028+18