Katrina can rums 10 miles per hour because if you multiply 5 miles per hour by 2 is ten
I sort of know the metric system
Answer:

Step-by-step explanation:
Given


Required
The volume of the sphere
This is calculated as:

So, we have:


This gives:


Alex did the most amount of the homework assignment because if you turn them all into a fraction with a common denominator, Alex would have the most.
The fractions will be 80/120, 60/120, 60/120, and 105/120 which is Alex.