I'm not sure you are asking the right question? it tells you what the radius is right there. What is the question asking
Answer: E. 4/5
Step-by-step explanation: You have to put the decimal (0.8) over its place value. So in this case 0.8 turns into 8/10. Then you must simplify 8/10, by dividing the numerator (8) and the denominator (10) by the greatest common factor (2). Which gives you the answer 4/5.
I say the answer is A, correct me if I'm wrong.
Expressions equivalent to 3(1+x)+7 is x+10