Answer:
(a) 2%
Step-by-step explanation:
A score of 60 is 2 standard deviations below the mean (80 -2·10 = 60). The empirical rule tells you that 95% of the distribution is within 2 standard deviations of the mean. The remaining 5% is split evenly between those that are more than 2 SD above the mean and those that are more than 2 SD below the mean.
That tells you the percentage who failed is about 2.5%. The best answer choice is 2%.
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<em>Additional comment</em>
The empirical rule is a little bit sloppy, but it gets you in the ballpark. The actual percentage is closer to 2.275%.
Answer:
d
Step-by-step explanation:
because its a whole number as in the square root is 4
Answer:
The Moon's diameter is greater than
miles
Step-by-step explanation:
we know that



by proportion
Find the Moon's diameter
Let
x-----> the Moon's diameter in inches

Compare

therefore
The Moon's diameter is greater than
miles
Answer:
Step-by-step explanation:
is already simplified.
Answer:
(x-2)(3x²-4 )
Step-by-step explanation:
- First, you <u>multiply 3x and 8</u> to equal 24x²
- Then, you find the variables that equal -10x (-2x, and -12x)
- then <u>replace the -10x with the two variables you found</u> (3x²-2x-12x+8)
- Sperate the variable (3x²-2x) and (-12x+8)
- Find the <u>GCF</u> of both x(3x-2) and -4(3x-2) (the binomial in the parentheses MUST BE THE SAME
- Replace one of the parentheses with x-4
- Answer: (x-2) (3x-4)