The capacity of the tank would be 128 pints.
The sample size should be 73.
We use the formula
To find the z-score:
Convert 95% to a decimal: 0.95
Subtract from 1: 1-0.95 = 0.05
Divide by 2: 0.05/2 = 0.025
Subtract from 1: 1-0.025 = 0.975
Using a z-table (http://www.z-table.com) we see that this value goes with a z-score of 1.96. Using this, our value for σ and our margin of error, we have:
1. (3,-2)
2. (-2,2)
3. (1/3,2/3)
4. (13/7, 40/7)
Answer:
Correct answer: Figure A's sides are 2/5 of figure B.
Step-by-step explanation:
In the order the figures are given the proportion will be:
A : B = 2 : 5
By multiplying the outer and inner members of the proportion we get:
5 · A = 2 · B ⇒ A = (2/5) · B
That mean figure A's sides are 2/5 of figure B.
This means that the two units of figure A are referred to as the five units of figure B.
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