Answer:

Step-by-step explanation:






The correct answer is 4.8 hours
Explanation:
This mathematical problem can be solved by using the rule of three, which involves finding an unknown value by using three related values. The process is shown below:
1. It is known a fully charged battery (100% battery) lasts 16 hours. This can be represented as 100 = 16. But it is not know how much a 30% battery last; this can be represented as 30 = x.
2. Write all the values
100 = 16
30 = x
3. Cross multiply to create an equation and solve the equation
100 x = 48
x = 480 / 100
x = 4.8
Answer:
All two are to the second power
Step-by-step explanation:
Answer: False
=============================================================
Explanation:
The radical is one step away from being fully isolated. We would apply the rule that
In this case,

Meaning that the equation

is the same as

From here, we square both sides and use algebra to isolate x.
Answer:
28.27
you just have to know the formula