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3 years ago

A function f(x) s defined as f(x)=-8x^2. What is f(-3)?

Mathematics

2 answers:

lisabon 2012 [21]3 years ago

8 0

You substitute the x in the equation -8x^2 so it would be -8(-3)^2 so the answer would be -72

Semenov [28]3 years ago

5 0

$f(-3)=-8\cdot(-3)^2\\
f(-3)=-8\cdot9\\
f(-3)=-72
$

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Mariana [72]

Answer:

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Using that formula we get:

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3 years ago

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with mean 1252

svp [43]

The z-score is given by the formula:
z=(x-μ)/σ
μ=1252
σ=129
The answer to the questions given will be as follows:
a] what is the probability that a randomly selected bag contains between 1100 and 1400 chocolate chips?
z=(1400-1252)/129
z=1.15625
P(x≤1400)=0.8770

z=(1100-1252)/129
z=0.1190
P(X≤1100)=0.1190

the answer will be:
P(1100≤x≤1400)=0.8770-0.1190=0.758

b]what is the probability that a randomly selected bag contains fewer than 1000 chocolate chips?
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P(X≤1000)=0.0256

c] what proportion of bags contains more than 1200 chocolate chips?
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z=-0.4031
P(X≥1200)=1-P(X≤1200)=1-0.4031=0.5969

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Step-by-step explanation:

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