If possible find the radius of a circle where the area of the circle and the circumference of the circle are equal is there more than one answer

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then,the two had the same amount of money. how much money did each have originally?

What fraction is equivalent to 0.46464646··· a. 46⁄99 b. 46⁄999 c. 46⁄100 d. 23⁄50