<span>36x³a + 45xa² =</span>9xa(4x²+5a)
I also believe B is the answer...i belive :)
Answer:
of height has been increased in second jump from the first jump.
Step-by-step explanation:
In first meet, height of best jump = 414 feet
In second meet, height of best jump = 456 feet
Increase in height = 456 feet - 414 feet
= 42 feet
The fraction of increased in height = 

Hence,
of height has been increased in second jump from the first jump.
The answer would be 7 i think:)