Consider the problem: After charging for 1/3 of an hour, a phone is at 2/5 of its full power. How long will it take the phone to
charge completely? Decide whether each equation can represent the situation.
2 answers:
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Answer:
Step-by-step explanation:
The initial expression:
Identify your values:
Substitute:
Following PEMDAS, nearly everything is in parentheses, so move to exponents:
Multiply and
:
Multiply and
:
Simplify:
Answer:
NM = 15
Step-by-step explanation:
There is a property of secants and tangents to a circle where:
The square of the tangent length is equal the length of the external segment of the secant times the whole secant length.
Therefore, in our question, we have that:
The values of NM, ML and MK are:
So we have:
So the length of NM is: