Answer:
12π
Step-by-step explanation:
The formula for arc length is given as:
Plug r = 24 and θ=π/2 in the above formula, we fi d:

248/4=62
62•7 1/2=465 miles
He will go 465 miles in 7 hours and 30 minutes
(negative square root two)/2, (negative square root two)/2
The answer is 20!
you need to change the subtraction sign to an addition sign and change -4 to a 4. then, solve!
hope this helps!!