so basically, you are asking: 5/16 x 8/15 (once it is simplified and all, sry I couldn't give you a more detailed answer.)
So we multiply 8 and 5 to get 40 and 16 and 15 to get 240 and now it is 40/240.
40/240 needs to be turned into into a decimal too, and we can multiply 240 with 5 to get 1000 as our "power of ten".
At the same time, 40 needs to be multiplied with 5 as well, so we get 200/1000, which in decimal is 0.200.
We then simplify it to 0.2 and that is the answer!!!
Just simple kinematics,
Jack = v1 = 60 mph
Joe = v2 = 30 mph
t = 10 min = 1/6 hr
Jack Dist = (60 mph) * (1/6 hr) = 10 miles
Joe Dist = (30 mph) * (1/6 hr) = 5 miles
Total Distance Between = 15 miles
If you have trouble imagining points starting from some unknown and traveling to a mid point, just imagine it as if they started from some point then traveled away in the same manner, how far apart the would be.
The entire triangle itself will have an area of 16, because the side length of the entire triangle is 4, so 4x4=16.
Then, we'll have to find the area of the space that is NOT the stacked squares.
If you look closely there are two half-triangles to accompany each square so we can put them together and if you look even MORE closely, all of the side triangles equal HALF of all of the stacked squares combined.
I hope this gave you a clue, but I am warning you that I am not exactly great at math and let alone geometry.