The range is the difference between the highest number and the lowest number.
The highest number would be 67, the lowest number is 43.
The range is 67 - 43 = 24
Answer: √51
—————————
a^2 + b^2 = c^2
a^2 + 7^2 = 10^2
a^2 + 49 = 100
a^2 = 51
√(a^2) = √51
a = √51
