2 years ago

Urgent HELP PLS I will give you brainliest! #HardMathQuestion

Mathematics

1 answer:

vredina [299]2 years ago

3 0

Kylie and jack ther lines both meet at 4,40

Hope this helps

Plz mark brainliest

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Problem PageQuestion Calcium levels in people are normally distributed with a mean of mg/dL and a standard deviation of mg/dL. I

SIZIF [17.4K]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The calcium level that is the borderline between low calcium levels and those not considered low is $c = 8.68$

Step-by-step explanation:

From the question we are told that

The mean is $\mu = 9.5\ mg/dL$

The standard deviation $\sigma = 0.5 \ mg/dL$

The proportion of the population with low calcium level is $p =$ 5% = 0.05

Let X be a X random calcium level

Now the P(X < c) = 0.05

Here P denotes probability

c is population with calcium level at the borderline

Since the calcium level is normally distributed the z-value is evaluated as

$P(Z < \frac{c - \mu}{\sigma } ) = 0.05$

The critical value for 0.05 from the standard normal distribution table is

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=> $\frac{c - \mu}{\sigma } = -1.645$

substituting values

$\frac{c - 9.5}{0.5 } = -1.645$

=> $c - 9.5 = -0.8225$

=> $c = 8.68$

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4 years ago

Given the function ƒ(x) = 3x + 5, find ƒ(4) and x such that ƒ(x) = 38.

MissTica

Answer: A.17;11

f(4)= 3(4) + 5

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=17

And, f(x)= 38

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