Answer:
C
Step-by-step explanation:
Square root of 92 is 9.591663047
so round that to 9.59

By the way, Google has a built in calculator. You can just type in "321.5 kmph in mph" and it will come up with this answer.
You could also use the fact that

,
According to the properties of equality, if you have two equal expressions and you change them in the same way, the results wil also be equal.
So that means we can multiply each side by 321.5 and get our answer above.
Answer:
The answer is B. Between 4.5 and 6 hours since he started playing
Step-by-step explanation:
Answer:
Here's how to solve.
Step-by-step explanation:
10 to the 4th power= 10,000
So it would be 2.25*10,000
22,500 would be your answer.
Answer:
The hummingbird beats its wings 86 400 times in one hour.
Step-by-step explanation:
There are 60 minutes in an hour. There are 60 seconds in a minute.
1h = 60m
= 60 × 60s
= 3600s
1s = 24 times
3600s = 24 × 3600
= 86 400 times