Sure, let's solve this step-by-step.
We are given:
- The widening rate of the Red Sea: 1.25 centimeters per year.
- The total desired widening: 812.5 centimeters.
We need to find out how many years it will take the Red Sea to widen by 812.5 centimeters at a rate of 1.25 centimeters per year.
To find this, we can use the formula for time:
[tex]\[ \text{Time} = \frac{\text{Total Distance}}{\text{Rate}} \][/tex]
Now let's substitute the given values into the formula:
[tex]\[ \text{Time} = \frac{812.5 \text{ cm}}{1.25 \text{ cm/year}} \][/tex]
When we divide 812.5 by 1.25, we get:
[tex]\[ \text{Time} = 650 \text{ years} \][/tex]
Therefore, it will take 650 years for the Red Sea to widen by another 812.5 centimeters.
The correct answer is:
B. 650
