Answer:
Option B.
Step-by-step explanation:
Given information:
Σ(x − M) = 44
where, M is mean.
Sample size = 12
The computational formula for sample variance is
where, M is sample mean and N is sample size.
Substitute Σ(x − M) = 44 and N=12 in the above formula.
The sample variance is 4.0.
Therefore, the correct option is B.
You could say 8r+2 times s +4 or –5x2y4
Answer:
$112.80
Step-by-step explanation:
You are buying 8 student tickets, each costing $10.68. Multiply 8 with 10.68:
10.68 x 8 = 85.44
You are buying another 2 adult tickets, each costing $13.68. Multiply 2 with 13.68:
13.68 x 2 = 27.36
Next, add the two costs together:
27.36 + 85.44 = 112.80
$112.80 is your total cost.
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Answer:
1/10
Step-by-step explanation:
Divide 3/10 by 3. Remember to "keep, flip, change".
3/10 ÷ 3/1
3/10 × 1/3
Multiply across: 3/10 × 1/3 = 3/30
Simplify: 3/30 = 1/10
Answer:
the range is 5-8 hours
Step-by-step explanation:
325+175t=1200
175t=875
875/175
t=5
325+175t=1725
175t=1400
1400/175
t=8
