Answer:
to estimate the result of multiplication (product), round the numbers to some close numbers that you can easily multiply mentally. One method of estimation is to round all factors to the biggest digit (place value) they have.
Step-by-step explanation:
Answer:
18432 km/h
Step-by-step explanation:
It is given that a sound wave travels through iron at a rate of 5120 m/s.
We know that
1 km = 1000 m
1 hour = 60 minutes
1 minutes = 60 second
Using these conversions we get
1 m = 0.001 km
1 hour = 3600 second
![5120\text{ m/s }=5120\times 0.001\times 3600\text{ km/h}](https://tex.z-dn.net/?f=5120%5Ctext%7B%20m%2Fs%20%7D%3D5120%5Ctimes%200.001%5Ctimes%203600%5Ctext%7B%20km%2Fh%7D)
![5120\text{ m/s }=18432\text{ km/h}](https://tex.z-dn.net/?f=5120%5Ctext%7B%20m%2Fs%20%7D%3D18432%5Ctext%7B%20km%2Fh%7D)
Therefore, the sound wave travels through iron at a rate of 18432 km/h.
64 inches is greater than 5 feet.
Hope I helped! <3
We have to solve x in terms of a, b and c:
a x - 3 b = c
a x - 3 b + 3 b = c + 3 b
a x = c + 3 b
x = ( c + 3 b ) : a
Answer:
4 ) ( c + 3 b ) / a