The answer is B. You didn't mention compounding, so I have to assume that this is simple interest. The formula for simple interest is <span>Interest = principal * interest rate expressed as a decimal * time in years. </span> <span>$126 = $450 * X * 7. Now multiply $450 * 7 years = $3,150 </span> <span>$126 = 3,150X </span>
<span>What has been done to the X? It was multiplied by $3,150. What is the opposite of multiplication? It is division. Remember that whatever we do to one side of the equal sign we must also do to the other side of the equal sign. </span>
<span>Any number over itself = 1. Now we have </span> <span>.04 = X </span>
<span>To change a decimal to a percent move the decimal place two places to the right and add a percent sign. </span> <span>.04 = 4$. The answer is B</span>
The interval <span>when written in the form of lower limit and the upper limit would be 95.8 - 98.2. This can be calculated by subtracting 95 with 1.2 and by adding 95 with 1.2. Hope this answers the question. Have a nice day. Feel free to ask more question.</span>
