SOMEONE HELP ME PLEASE?.... WILL MARK BRAIN LEST 5 STAR RATEING THANKS ON YOUR PAGE
1 answer:
1. the way to right an exponentional is a*b^x, where a=initial, b=rate, and x=x.the initial value here is 2. The rate is 3 because in order to get from 2 to 6, you multiply 3, and in order to get from 6 to 18, you multiply by 3.
so your equation is 2(3)^x.
2. So carter initially sends 10 posts, and they further send 2. So a=10 and b=2.
10(2)^x.
3. So you can use desmos.com and plot out the graph. See the attachment for the graphs. the blue=amber, green=ben, orange=carter.
4. Just just plug in x=3 and x=10 for all the functions.
Amber - when x is 3, it's 192. when x is 10, it's 3145728 (DANG THAT'S HUGE)
ben-when x is 3, it's 54. when x is 10, it's 118098
carter - when x is 3, its 80. when x is 10, it's 10240.
5. It shifts the graph 45 units upward. it is a rigid translation. so the y intercept is 48.
6. Amber because the rate is the highest. for a while, the others may be slightly ahead, but then amber's graph takes over and she gets the most posts.
7. If you'd want the post to spread like wildfire, you'd want to want to have a graph similar to Amber's, where the shares are more but less initial friends. This can be seen because the graph of Amber's has a much faster spread rate than the other graphs. Also, when comparing similar points, Amber always had the most shares.
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Complete Question
The picture of the stem plot National and American League is shown on the first uploaded image
Answer:
The value is
Step-by-step explanation:
From the question we are told that
The stem plot for National League is
The sample size is n = 14
Generally the stem plot is interpreted in this manner
The numbers on the first column represents the tens of a two digit number while the second column holds the possible unit number the tens in the first column can be combined with
for example 4th row
5 3 5 5 5
is equivalent to
53 55 55 55
Generally the mean for the national league is mathematically represented as
=>
=>
A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that her estimate includes the actual college population mean
It means confidence level is 0.85.
After taking survey the estimate of population standard deviation is found as 4.5 years. The given margin of error is 0.5 years
The sample size is obtained using formula
n=
Where std = standard deviation
alpha = 1 -c = 1-0.85 = 0.15
z(α/2) = z(0.15/2) = z(0.075)
It is the critical value of z such that area above z and below -z is 0.075
Use z score table to find the probability exactly or very close to 0.075 and note the corresponding z score value.
In z score table there is no accurate 0.075 probability value. The close value is 0.0749 which corresponds to z score -1.44
For calculation we take positive z score value.
So we get z(α/2) =1.44
Using all the given values into formula
n = [(1.44 * 4.5) / 0.5]^2
n = 167.96
Rounding it to nearest integer we get n=168
The number of people need to surveyed is n=168
