Help plzz I don't understand this at all.
1 answer:
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Answer:
The cutoff for a failing score was 40,
Approximately 2.3% of the students failed.
Step-by-step explanation:
Given,
Mean,
Standard deviation,
Let x represents the cutoff for a failing score,
Thus, according to the question,
Thus, the cutoff for a failing score is 40,
∵ P(<-2) = 0.02275 = 2.275 % ≈ 2.3 %
Hence, Approximately 2.3 % of the students failed.
Answer:
1,250 miles/hour
Step-by-step explanation:
To find miles per hour - .
Answer:
About 32% of her pay was deducted ⇒ 2nd answer
Step-by-step explanation:
Lisa’s gross pay was $1204.89
Her net pay was $818.44
We need to find the percentage of the amount deducted from her pay
<u><em>Lets calculate the deduction amount</em></u>
The deduction amount is the difference between the gross pay and
the net pay
∵ The amount deducted = gross pay - net pay
∵ Gross pay = $1204.89
∵ Net pay = $818.44
∴ The amount deducted = 1204.89 - 818.44 = $386.45
<u><em>Now lets find the percentage of the amount deducted </em></u>
∵ Percent of deducted = [amount deducted/gross pay] × 100%
∵ The amount deducted = $386.45
∵ Gross pay = 1204.89
∴ Percent of deducted = × 100%
∴ Percent of deducted = 32.07%
<em>About 32% of her pay was deducted</em>