Do a proportion
6/7= x/24
Cross multiply and divide
6 x 24= 144
144 divided by 7 is 20.57
Answer is 20.57 (now depending on if you need to round it,
Nearest tenth= 20.6
Nearest hundredth= 20.57
Nearest whole number= 21
First you have to complete the square. The first step would be 3x^2-6x=-11. Then you divide -6 by 2 and square the number you get. 3x^2-6x+9=-11+9. 3x^2-6x+9=-2. Factor out the three to get 3(x^2-2x+3)=-2. You can't factor what is in the parenthesis. You should then add two to each side. 3(x^2-2x+3)+2.
A=3
B= I have no clue sorry.
C=2
7) .5+78.2=287 you subtract 78.2 from 287 and get 208.8 then you divide that by .5 and get 417.6
x = 17.6
Answer:
The sample size is 183.
Step-by-step explanation:
Given:
σ = $1050, ppulatin standard deviation
99% confidence interval
Accuracy = +/- $200
The accuracy is given by
z*(σ/√n)
where
z* = 2.576 for 99% confidence level (from tables)
n = sample size
Therefore
2.576(1050/√n) = 200
√n = (2.576*1050)/200 = 13.524
n = 182.9
<em>The sample size is 183</em>
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