Ask question

Ask question

All categories

2 years ago

8

The intelligence quotient (iq) test scores for adults are normally distributed with a mean of 100 and a standard deviation of 15

. what is the probability we could select a sample of 50 adults and find the mean of this sample is between 95 and 105?

1 answer:

Mrrafil [7]2 years ago

3 0

<span>0.9818 is the answer </span>

You might be interested in

Find the x−and y−intercepts.

Alexeev081 [22]

Y intercept is (0,-7) and x interpret is (-2,0)

5 0

2 years ago

Please only answer if your certain it will mean a lot I can give extra points or brain list if you like or a thanks please don’t

BigorU [14]

Answer:

Ms. Cortez earns 500 dollars for working 30 hours. It's the last choice.

Step-by-step explanation:

You just have to substitute 30 into the equation in place of x, since x represents hours.

f(30) = 50 + 15(30)

f(30) = 50 + 450

f(30 = 500

3 0

2 years ago

A parabola intersects the x-axis at x=3 and x=9 what is the x-coordinate of the parabola's vertex?

KiRa [710]

Here we are given the x intercepts at x=3 and x=9

So let us try to make quadratic equation for this using given information.

We have factors in the form (x-a)(x-b)

where a and b are x intercepts given to us.

So rewriting in factored form:

$y=(x-3)(x-9)$

Now let us simplify it:

$y=x^{2}-12x+27$

Let us find the vertex now,

For a quadratic equation of the form:

$y=ax^{2}+bx+c$

For x coordinate , we have the formula,

$x=\frac{-b}{2a}$

So using this formula for our equation,

$x=\frac{-(-12)}{2(1)}$

So x = 6

Answer: The x-coordinate of the parabola's vertex is 6.

7 0

3 years ago

Read 2 more answers

Find and sketch the domain of the function. f(x,y)=√(4-x^2-y^2) +√(1-x^2)<br>

elena55 [62]

Answer:

Hello

Step-by-step explanation:

The domain is limited with 2 lines parallel: -1 ≤ x ≤ 1

and the disk ? (inside of a circle) of center (0,0) and radius 2

$dom\ f(x,y)=\{(x,y) \in \mathbb{R} ^2 | \ -1\leq x \leq -1\ and \ ( -\sqrt{4-x^2} \leq \ y \leq \sqrt{4-x^2}\ ) \ \}\\$

3 0

2 years ago

A group of 16 people is choosing a chairperson and vice-chairperson. They put all 16 people's names into a hat. The first name d

Strike441 [17]

Answer:

2 in 16

Step-by-step explanation:

6 0

2 years ago