You and your friend hike to a waterfall that is 4 miles east of where you left your bikes. You then hike to a lookout point that is 2 miles north of your bikes. From the lookout point, you return to your bikes. a. About how far do you hike? Assume you travel along straight paths.

Answer is 10.5 miles

I used Pythagorean theory to solve for the unknown distance from the waterfall to lookout point.
a^2 + b^2 = c^2
2^2 + 4^2 = c^2
20 = c^2
Take square root of both sides
4.47 = c
Rounded to 4.5 miles

Add 4 miles and 2 miles and 4.5 miles
10.5 miles total

4,000,000

Or you can also say 4 million

Step-by-step explanation: