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Write out the numbers fully and divide the users in Europe by the total number of people. Multiply by 100 to get it in percentage terms
Answer:
156 minutes
Step-by-step explanation:
So we need to create an equation to represent how Frank's phone company bills him
- I will denote "y" as the total for his bill
- I will denote "x" as the number of minutes Frank uses
So the phone company charges an $8 monthly fee, so this value remains constant and will be our "y-intercept"
They then charge $0.06 for every minute he talks, this will be our "slope"
Combining everything into an equation, we have: y = 0.06x + 8
Now since we were given Franks phone bill total and want to figure out how many minutes he used, we just need to solve the equation for x and plug in our known y value
- y = 0.06x + 8 → y - 8 = 0.06x →
- Then plugging in our y value we get
Frank used up a total of 156 minutes
A constant function is exactly that - constant - meaning it exhibits no change whatsoever with respect to any change in its input. If , then it doesn't matter what value of
I give you, the value of
will always be nothing other than 1.
That the derivative of such a function is zero follows immediately from the definition of the derivative. If and
, then