A
Because the gradient of a vertical line is undefined.
Answer:
(1.1155 ; 1.1245)
Step-by-step explanation:
Given that :
Sample mean, xbar = 1.12
Sample standard deviation, s = 0.011
Sample size, n = 25
Since we are using the sample standard deviation, we use the T distribution ;
The confidence interval is defined as :
C. I = Xbar ± Tcritical * s/√(n)
Degree of freedom, df = n - 1 = 24
Tcritical(0.05, 24) = 2.064
C. I = 1.12 ± (2.064 * 0.011 / √25)
C.I = 1.12 ± 0.0045408
Lower boundary = (1.12 - 0.0045408) = 1.1155
Upper boundary = (1.12 + 0.0045408) = 1.1245
(1.1155 ; 1.1245)
Answer: $20
Step-by-step explanation:
To calculate 20% tip on a bill of $95.79, divide 20 by 100, then multiply by $95.79
=20/100 x 95.79
=0.2 × 95.79
=$19.558
To the nearest dollar is $20, since 0.558 is greater than 0.5, we round up.
Answer:
1 is the coefficient of the last term in the binomial expansion