Find the simple interest earned on a \(2,000 deposit at 4% annual interest for 3 years.</p> <p>Solution:</p> <p><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.6833em;"></span><span class="mord mathnormal" style="margin-right: 0.07847em;">I</span><span class="mspace" style="margin-right: 0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right: 0.2778em;"></span></span><span class="base"><span class="strut" style="height: 0.7278em; vertical-align: -0.0833em;"></span><span class="mord">2000</span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">×</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.7278em; vertical-align: -0.0833em;"></span><span class="mord">0.04</span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">×</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.6444em;"></span><span class="mord">3</span></span></span></span> <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.6833em;"></span><span class="mord mathnormal" style="margin-right: 0.07847em;">I</span><span class="mspace" style="margin-right: 0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right: 0.2778em;"></span></span><span class="base"><span class="strut" style="height: 0.6444em;"></span><span class="mord">240</span></span></span></span></p> <p><strong>Problem 2:</strong> A certificate of deposit (CD) offers a 6% annual interest rate. If you invest \) 5,000 for 2 years, how much will you have at the end of the 2-year period?
You borrow \(1,500 from a friend at 8% annual interest. If you repay the loan in 1 year, how much will you pay in total?</p> <p>Solution:</p> <p><span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.6833em;"></span><span class="mord mathnormal" style="margin-right: 0.07847em;">I</span><span class="mspace" style="margin-right: 0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right: 0.2778em;"></span></span><span class="base"><span class="strut" style="height: 0.7278em; vertical-align: -0.0833em;"></span><span class="mord">1500</span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">×</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.7278em; vertical-align: -0.0833em;"></span><span class="mord">0.08</span><span class="mspace" style="margin-right: 0.2222em;"></span><span class="mbin">×</span><span class="mspace" style="margin-right: 0.2222em;"></span></span><span class="base"><span class="strut" style="height: 0.6444em;"></span><span class="mord">1</span></span></span></span> <span class="katex"><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height: 0.6833em;"></span><span class="mord mathnormal" style="margin-right: 0.07847em;">I</span><span class="mspace" style="margin-right: 0.2778em;"></span><span class="mrel">=</span><span class="mspace" style="margin-right: 0.2778em;"></span></span><span class="base"><span class="strut" style="height: 0.6444em;"></span><span class="mord">120</span></span></span></span> Total amount = \) 1500 + 120 = \(1620</p> <p><strong>Problem 4:</strong> A bank offers a savings account with a 3% annual interest rate. If you deposit \) 8,000 and keep it in the account for 4 years, how much interest will you earn? Find the simple interest earned on a \(2,000
Solution: