Exponential growth and decay

Sami puts $2000 into an account that earns compound interest at $1.8\%$ per year. Calculate the total interest paid to Sami after $3$ years.

May/June 2018

In 2019, Nicole earned $22000$ as her yearly income.

May/June 2021

Fill in the values table for $y = \frac{2^x}{5}$.

May/June 2023

Fill in the table for $y = \frac{2^x}{5}$.

May/June 2024

Zaya puts $\$4500$ into a savings account. The account gives simple interest at a rate of $3.2\%$ per year. Calculate the value of the investment after $5$ years.

May/June 2025

Ameerah places $480$ dollars into a savings account. Simple interest is paid at a rate of $3.6\%$ per year. Calculate the value of the investment after $5$ years.

May/June 2025

Complete the table for the function $y = \frac{4}{5} \times 2^x$.

Oct/Nov 2020

Idris repairs computers. He works out the fee for a repair like this. $56 for the first hour$ Then $12.25$ for each extra $15$ minutes.

Oct/Nov 2023

Anya purchases $4$ shirts and $3$ hats. She hands over $\$100$ and gets $\$21.50$ back as change. Every shirt has the same price. Each hat is priced at $\$13.50$. Find the price of one shirt.

Oct/Nov 2024

A country's population grows exponentially at a rate of 3.6% per year. On 1st January 2024, the country’s population stands at 5.4 million.

Oct/Nov 2025

A town’s population falls exponentially by x% each year. It was 120000 on 1 January 2020, and by 1 January 2023 it had reduced to 102885.

Oct/Nov 2025