All are. Explanation: A- This is correct because half of the diameter is the radius. Therefore, The radius twice = the diameter. B- This is correct because it is the formula. You can always look it up to check. C- Circumference is the totality. D- When you multiply, it is the total. E- Refer to A
6+5=11+5=16+5=21 3+6=9+6=15+6=21 It will take Marco and Sophie 3 hours to get the same amount of money. The amount of money they will have will be $21.