The answer is the mean is 8. The range is equal to the largest number, 10 minus the smallest number, 5. It equals 5, so d is wrong. The mean is all of the values added together, 80, divided by the number of values, 10. So, 8. The median is the middle which is between 7 and 8, so 7.5. Five has no dots.
Angle two would be 180-m<1
180-52= 128
Measurement of angle two is 128 degrees
=0.4237288136 ..... 0.423 | 7 +1 ~~ 0.424
If you take 3.5 and divide it by 0.05, or times 20, that would make it 70.