Rates Of Change Quiz

<p>Alice opened a new savings account.</p><ul><li>Her initial deposit was `$20`. </li><li>She deposited `$5` per day for `6` days. </li><li>She then started to spend `$10` per day for `7` days. </li></ul><p>Questions:</p><ul><li>What was her balance after `6` days?</li><li> What was her balance after the following `7` days?</li></ul><p><highlight data-color="#666" data-style="italic">Round to the nearest hundredth if needed. </highlight></p>

<p>Carol's savings account had an initial balance of `-$200`. After saving for `10` months, her account's final balance was `$2text(,)800`. </p> <p>What was the average rate at which Carol saved money every month?</p>

<p>Jasmine wanted to keep track of the balance in her account.</p><ul><li>Jasmine's balance at the start of the month was `$45`. </li><li>She added `$18` a day from her weekend work earnings into the account for `2` days. </li><li>Then, for the next `7` days, Jasmine spent `$13` each day on snacks and beverages from the school cafeteria.</li></ul><p>Questions:</p><ul><li>What was the balance of her account after `2` days?</li><li>What was the balance of her account after the next `7` days?</li></ul><p><highlight data-color="#666" data-style="italic">Round to the nearest hundredth if needed. </highlight></p>

<p>A submarine had a starting elevation of `-10` feet. It then descended `40` feet per hour. </p> <p>What was the submarine's elevation `5` hours later?</p>

<p>In January, Regina's savings account had a balance of `-$150`. She saved `$400` per month for `9` months.</p> <p> What was her account balance at the end of October?</p>

<p>A submarine was at an elevation of `-394` feet. Its elevation becomes `-634` feet after descending for `40` seconds. </p> <p>What was the average rate at which the submarine was moving every second?</p>