PLEASE HELP ASAP! Question 12. Thank you
1 answer:
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Answer:
a = 4, b =
Step-by-step explanation:
Use any ordered pairs of points from the table.
Substitute into the equation and solve for a and b, that is
Using (0, 4), then
4 = a = a
Hence a = 4
Using (2, 1), then
1 = 4 ( divide both sides by 4 )
b² = ( take the square root of both sides )
b =
Equation is
y = 4
Question: Evaluate/death stare at 
.
Let's talk about what logarithms mean.
Suppose
.
That's the same thing as
. It's just been simplified.
(Logarithms are the inverse operations of exponents)
We can use a calculator to evaluate logarithms that are in base 10.
(In this case, the base is 1/6)
How can we change this so that it uses just base 10?
We can use something called the change-of-base formula.
Here's what the change of base formula looks like.
In this case, we'll set the base
to be 10. (you can set it to whatever you want) 
is going to be 1/6, and 
is 5.
When the base is 10, we don't have to write it, it's like a plus zero or a times one.
Punch this into a calculator to find your answer.
You can always check your answer if you need to, of course.
Let's talk about what logarithms mean.
Suppose
That's the same thing as
(Logarithms are the inverse operations of exponents)
We can use a calculator to evaluate logarithms that are in base 10.
(In this case, the base is 1/6)
How can we change this so that it uses just base 10?
We can use something called the change-of-base formula.
Here's what the change of base formula looks like.
In this case, we'll set the base
When the base is 10, we don't have to write it, it's like a plus zero or a times one.
Punch this into a calculator to find your answer.
You can always check your answer if you need to, of course.