Answer:
Step-by-step explanation:
L=3(5280)/(2(380+250))
L=15840/1260
L=12.57
So to walk three miles one must walk around the garden 12.57 times.
I think the answer is D. hours because its variation does not depend on another variable
30h-40+60 or 30h+20 I think
I don't know if this is right, but I'm pretty sure it's B.