Answer: I know the answer but......
Explanation: Study hard so you can answer those questions
Answer:

80 is the number in the square root
Step-by-step explanation:

1 because 1 times 1 times 1 equals 1
Alright, lets get started.
Jessica can swim a lap in
seconds
Converting it into decimals, 
Means
seconds
Means Jessica can swim a lap in 29.4 seconds
Marta can swim a lap in 28.7 seconds.
So, Martha is faster than Jessica by
seconds
It means Marta is 0.7 seconds faster than Jessica. : Answer
Hope it will help :)
Answer:
9m⁸
Step-by-step explanation:
3^2=9
(m⁴)² = m⁸
9*m⁸