25 - 6 = 19 so 19 ft. it was 19 ft before he cleaned out the tank.
Answer:
2(9+15)
Step-by-step explanation:
18 + 30 = 2(9+15)
Answer:
-3
Step-by-step explanation:
We can use any two points in the table and the slope formula
m = (y2-y1)/(x2-x1)
Using ( (0,4) and ( -2,10)
= ( 10 -4)/(-2 -0)
= 6/-2
= -3
Answer:
Test = 17.143 ;
Pvalue = 0 ;
Reject the Null ;
(-0.028 ; - 0.022) ;
We conclude that content are different.
Step-by-step explanation:
Given that:
μ1 = μ
n1 = 36 ; n2 = 36
x1 = 0.78616 ; x2 = 0.81111
s1 = 0.04444 ; s2 = 0.00752
Test statistic :
(x1 - x2) / √(s1²/n1 + s2²/n2)
(0.78616 - 0.81111) / √(0.00444²/36 + 0.00752²/36)
- 0.02495 / 0.0014554
= 17.143
Pvalue :
Z < 17.143
Pvalue = 0
Since Pvalue < α ; Reject the Null
The confidence interval using a confidence interval calculator is (-0.028 ; - 0.022)
Since the interval does not contain Zero ; then we reject the Null and conclude that the content are different.