$5,000 is deposited today into a bank account. the account earns 7.5% per annum compounded half yearly for the first 6 years, then 7.8% per annum compounded quarterly thereafter. assuming no further deposits or withdrawals are made,

(a) calculate the account balance six months from today.

The account balance six months from today is $5,187.5.

Step-by-step explanation:

This is a compound interest problem

The compound interest formula is given by:

In which A is the amount of money, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per unit t and t is the time the money is invested or borrowed for.

In this problem, we have that

The total amount formula changes after 6 years, at which point each of the principal(initial money), interest rate, and n changes.

This item asks only the balance six months from today, so we use the information given for the first 6 years.

A is the account balance, the value we hope to find.

The loan is of $5,000. So

The account earns 7.5% per annum compounded half yearly, so .

We want to find the account balance in 6 months. However, t is measured in years. So

Solving the equation:

The account balance six months from today is $5,187.5.

the correct answer to your question is a. 4^4

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[2, 2.5)

(2.5, 3]

step-by-step explanation:

i think its these two not sure [2, 2.5)

(2.5, 3]