Answer: 7
Step-by-step explanation:
7
Answer:
Step-by-step explanation:
We're given one equation, we have to find the other equation and solve each for 200, and whichever has the lower x is the winner
for Jayden we are given
![(0, 48), (1, 56), (2, 64), (3, 72), (4, 80)](https://tex.z-dn.net/?f=%280%2C%2048%29%2C%20%281%2C%2056%29%2C%20%282%2C%2064%29%2C%20%283%2C%2072%29%2C%20%284%2C%2080%29)
This looks to be a line. The y values are each separated by a common difference
We can use two points to describe the line
![m = \frac{y_2-y_1}{x_2-x_1} = \frac{80-48}{4-0} = \frac{32}{4} = 8\\ K = 8m + b\\48 = 8(0) + b\\b = 48\\so\\K = 8m + 48](https://tex.z-dn.net/?f=m%20%3D%20%5Cfrac%7By_2-y_1%7D%7Bx_2-x_1%7D%20%3D%20%5Cfrac%7B80-48%7D%7B4-0%7D%20%3D%20%5Cfrac%7B32%7D%7B4%7D%20%3D%208%5C%5C%20%20K%20%3D%208m%20%2B%20b%5C%5C48%20%3D%208%280%29%20%2B%20b%5C%5Cb%20%3D%2048%5C%5Cso%5C%5CK%20%3D%208m%20%2B%2048)
Now we can set both
and
equal to 200
![200 = 8m + 48\\152 = 8m \\m = \frac{152}{8} = 19](https://tex.z-dn.net/?f=200%20%3D%208m%20%2B%2048%5C%5C152%20%3D%208m%20%5C%5Cm%20%3D%20%5Cfrac%7B152%7D%7B8%7D%20%3D%2019)
![200 = m^2 + 10\\m^2 = 190\\m = \sqrt{190} = 13.784](https://tex.z-dn.net/?f=200%20%3D%20m%5E2%20%2B%2010%5C%5Cm%5E2%20%3D%20190%5C%5Cm%20%3D%20%5Csqrt%7B190%7D%20%3D%2013.784)
Keiko's blog will reach 200 subscribers fastest.
F(2) = (5/2)f(1) = 8.0
f(3) = (5/2)f(2) = 20
f(4) = (5/2)f(3) = 50
f(5) = (5/2)*50 = 125
Answer:
$160
Step-by-step explanation: