X = y * 1.07
X = cost after tax
y = item before tax added
Answer:
$314
Step-by-step explanation:
1. She has 18 demonstrations, so she got $10 for each of the first 10 to equal $100.
2. She got 8 demonstrations after those 10. For each of those, she gets $15.50. $15.50x8=$124.
3. She had 6 sales. Every sale is $15. $15x6=$90
4. $100+$124+$90 =$314
Answer:
Null, H0: μ ≥ 16
Alternative ; H1: μ < 16
reject H0
Step-by-step explanation:
Null, H0: μ ≥ 16
Alternative ; H1: μ < 16
To compute the test statistic :
We need the sample mean and sample standard deviation :
15.87, 16.02, 15.78, 15.83, 15.69, 15.81, 16.04, 15.81, 15.92, 16.10
Using calculator :
Sample mean, m = 15.887
Standard deviation = 0.13
Test statistic :
(m - μ) / s/sqrt(n)
(15.887 - 16) / 0.13/sqrt(10)
-0.113 / 0.0411096
= - 2.749
Tcritical at 95%
Tn-1, 0.025
T10,0.025 = 2.262
Since the test statistic value is less than the critical value, reject H0
I think point b I’m not sure
Step-by-step explanation:
f (x)= x-7
= -1-7
= -6
g (x)= x^2
= (-1)^2
=1