If they're asking the distance between the tree and the man's shadow, that would be 12ft and if they're asking the distance between the tree and the actually man, that would be 15ft :).
Answer:
the correct answer is3 1/2
Go to khan academy they show you how
Answer: the answer will be 10
Step-by-step explanation: Because you are subtracting 30-20 since it says what is the total change in the temperature. do you undeerstand now?