H(10)=210-15(10)
h(10)=210-150
h(10)=60
The hot air balloon is at an altitude of 210. The hot air balloon slowly falls 15 () per minute, for 10 minutes. He ends up at 60 altitude
8.4 is the answer i believe

Explanation:
Since we have given that
Speed at which Eugene walked all the way to school = 3 mph
After realizing that she forgot her math book, she ran back
Speed at which Eugene walked back to her house = 7 mph
Let the distance between her house and her school be x
According to question,

Hence,

The diameter of human hair is 8.0 x 10^-6
hope this helps :)
The greatest common factor of 10 is 10 and the least common factor of 15 is 15
Hope I helped!!!!!