Answer:
20
Step-by-step explanation:
Answer:
250 centimeters
Step-by-step explanation:
............
5 significant figures but note that 0 is only non-significant when it begins a decimal its only significant when it's in between numbers or after a number
Answer:
= 
Step-by-step explanation:
In this case in order to simplify we need to know what the "power rule of exponents" is. Simply speaking this rule states that when you raise a power to a power you multiply the exponents. So in our case we ill get the following
= 
In order to get 42 we used the power rule which I mentioned earlier.