Please help it would be greatly appreciated:)

Mathematics

2 answers:

mixer [17]3 years ago

6 0

Answer:

I really don't know but can u help with mine-_-

Darina [25.2K]3 years ago

6 0

Sorry I haven’t learned that yet

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Iq scores are normally distributed with a mean of 100 and a standard deviation of 15 if one person is randomly selected what is

beks73 [17]

probability that the persons IQ falls between 110 and 130 is 0.2286 .

<u>Step-by-step explanation:</u>

Step 1: Sketch the curve.

The probability that 110<X<130 is equal to the blue area under the curve.

Step 2:

Since μ=100 and σ=15 we have:

P ( 110 < X < 130 )=P ( 110−100 < X−μ < 130−100 )

⇒ P ( (110−100)/15< (X−μ)/σ<(130−100)/15)

Since Z = (x−μ)/σ , (110−100)/15 = 0.67 and (130−100)/15 = 2 we have:

P ( 110<X<130 ) = P ( 0.67<Z<2 )

Step 3: Use the standard normal table to conclude that:

P ( 0.67<Z<2 )=0.2286

Therefore, probability that the persons IQ falls between 110 and 130 is 0.2286 .

4 0

3 years ago

Willa bought 5 tops that cost $72 after she applied a $20-off coupon. The tops all cost the same amount. Which equation can be u

guapka [62]

Answer:

14.40 dollars

Step-by-step explanation:

72 divided in 5

6 0

3 years ago

What is the domain of f(x) = 2^x?

hammer [34]

The given function has no undefined points nor domain constraint. Thus, the domain is: $-\infty \: < x < \infty$ .

<h3>Domain and Range</h3>

The domain of a function is the set of input values for which the function is real and defined. In the other words, when you define the domain, you are indicating for which values x the function is real and defined. An example, there is a restriction for the domain of fractions. The variable x in the denominator should be different of zero.

While the domain is related to the values of x, the range is related to the possible values of y that the function can have.

In this question, the function $2^x$ has no undefined points nor domain constraint. Therefore, the domain is: $-\infty \: < x < \infty$