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givi [52]
4 years ago
13

Evaluate the function f(x)=4*7^x for x=-1 and x=2. show your work

Mathematics
1 answer:
Aleks04 [339]4 years ago
4 0
Remember, x^-1=1/x

so

f(-1)=4(7)^-1=4(1/7)=4/7
f(2)=4(7)^2=4(49)=196
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Answer:

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Step-by-step explanation:

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P(X \geq 9) = P(X = 9) + P(X = 10) = {10 \choose 9}0.94^9*0.06+{10 \choose 10}0.94^{10} = 0.8824

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P(X ≤ 7) = 1-P(X > 7) = 1- (P(X=8) + P(X ≥9))

P(X≥9) was computed before, and

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Thus,

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The probability to select 7 or less graduated students is 0.019, less than 2% of the cases. We can say that it is unusual.

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