Maybe the answer is -4 ....? I just can't find any more logic to this problem.
If using the radius, you would multiply the radius by 2*pi, to calculate the circumference, which should be the same as the answer i got.
Answer:
Your answer would be the first option.
A right angle is 90 degrees
An obtuse angle is more than 90 degrees and that angle is more that 90 degrees
It would take 70,000 seeds if five out of seven are good. So over a quantity of 50,000 plants desired, you would sow 70,000 seeds. As 20,000 would statistically fail.
B. 0.930 ~Apex ;) .....................................