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Greeley [361]
3 years ago
5

A normal distribution has mean μ and standard deviation σ. An x-value is randomly selected from the distribution. Find P (μ − 3σ

≤ x ≤ μ)
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
6 0

Answer:

49.85%

Step-by-step explanation:

P(μ − 3σ ≤ x ≤ μ)

= ½ P(μ − 3σ ≤ x ≤ μ + 3σ)

= ½ (99.7%)

= 49.85%

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Shyniyah has $15. For every hour she works, she will earn $8 more. How many hours will she have to work to earn at least $200? G
Dimas [21]

just multiply 8 until you make it to 200 or the closest around 200


8 x 25 = 200

3 0
4 years ago
Read 2 more answers
In 2000, the population of an Ohio town was 140,212. The population is expected to grow at a rate of 2.5% each year.
zhenek [66]

The population would be 280,412

2.5% of 140212 is 3505 so you multiply the 3,505 by 40 and that’s ur answer. hope this helps

4 0
3 years ago
Read 2 more answers
NEED ASAP!!! WILL MARK BRAINLLIEST!!!!!! A student solved the equation 7x - 5 - 5x = 15 and found x = 5. What is the student's e
const2013 [10]

Answer:

the student messed up at the point of adding 5 to I5, they subtracted instead and got 2x=I0 which would mean x=5. when instead they should've added 5 and got 2x=20 and got x=I0

4 0
4 years ago
You are estimating the cost of optical sensors based on the resolution of the sensor. You decide to calculate the coefficient of
Mashcka [7]

Answer:

a. 88.70% of the variation in the cost is being explained by the resolution.

Step-by-step explanation:

Given :

Summation of (Yi - Ybar)2 = 147172

Summation of (Yhat - Ybar)2 = 130542

Summation of (Y - Yhat)2 = 16630

The Coefficient of determination (R²) :

Sum of Square regression (SSR) / sum of square TOTAL (SST). It gives the percentage of the dependent variable which can be explained by the regression line.

Cost is the dependent variable in this scenario.

SSR = Summation of (Yhat - Ybar)2 = 130542

SST = Summation of (Yi - Ybar)2 = 147172

Hence,

SSR / SST = 130542 / 147172

R² = 130542 / 147172

R² = 0.8870029 = (0.8870029 * 100%) = 88.7%

3 0
3 years ago
Use the given graph to determine the limit, if it exists. (4 points)
Inessa [10]

Limit of x approaches two from the left of f of x: 3. Limit of x approaches two from the right of f of x: - 1 (negative 1)

<h3>How to find the value of the function as x approaches infinity (+ve or -ve)?</h3>

If limits exist, we can take limits of the function, where x tends to -∞ or ∞, and that limiting value will be the value the function will approach.

In order to find the limit as x approaches two from the left of f of x:

Lim x→2- f(x) = ?

According to the graph, when x approaches two from the left (x<2), the function approaches 3:

Lim x→2- f(x) = 3

IN order to find the limit as x approaches two from the right of f of x:

Lim x→2+ f(x) = ?

According to the graph, when x approaches two from the right (x>3), the function approaches -1:

Lim x→2+ f(x) = - 1

Learn more about one-sided limits here:

brainly.com/question/23625942

#SPJ1

4 0
2 years ago
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