Your answer would be B 35 degrees
Answer:
ist the question
Step-by-step explanation:
write question first
Answer:
![f(x)=5(4)^x](https://tex.z-dn.net/?f=f%28x%29%3D5%284%29%5Ex)
Step-by-step explanation:
The exponential function is
.
is the initial value of the function, or the y-value when x=0. In this case,
=5. If we enter that into the equation:
![f(x)=5b^x](https://tex.z-dn.net/?f=f%28x%29%3D5b%5Ex)
Then we can use another point to solve for
.
![20=5b^1](https://tex.z-dn.net/?f=20%3D5b%5E1)
Since anything raised to the power of 1 remains the same, we can continue to solve algebraically.
![20=5b\\\frac{20}{5}=\frac{5b}{5}\\b=4](https://tex.z-dn.net/?f=20%3D5b%5C%5C%5Cfrac%7B20%7D%7B5%7D%3D%5Cfrac%7B5b%7D%7B5%7D%5C%5Cb%3D4)
Now that we have both the
and
value, we can return to the exponential function and fill in the blanks.
![f(x)=5(4)^x](https://tex.z-dn.net/?f=f%28x%29%3D5%284%29%5Ex)
I hope this helps!
Answer:
Step 1:
Texting plan costs = $20 per month,
Plus $0.05 per text message is sent or received.
Step 2:
Cost Equation
H(y)=20+0.05y
Step-by-step explanation: