Answer is 82
substitute z for 9
9^2 = 81+ 1= 82
10 inches would make him taller than 70, 9 inches would make him exactly 70
In 1 minute, bison runs 3520 feet
In 60 minutes, the bison would run
3520*60 feet
211200 feet per hour.
These are equivalent to;
40 miles per hour since 1 mile is equivalent to 5280 feet.
The bison is faster by 10 miles per hour
