1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OverLord2011 [107]
3 years ago
5

I need help on 5 and 6 please HELP ME

Mathematics
1 answer:
morpeh [17]3 years ago
8 0
480 breaths in 2 minutes
You might be interested in
A set of exam scores is normally distributed and has a mean of 80.2 and a standard deviation of 11. What is the probability that
ZanzabumX [31]

Answer:

93.32% probability that a randomly selected score will be greater than 63.7.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 80.2, \sigma = 11

What is the probability that a randomly selected score will be greater than 63.7.

This is 1 subtracted by the pvalue of Z when X = 63.7. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{63.7 - 80.2}{11}

Z = -1.5

Z = -1.5 has a pvalue of 0.0668

1 - 0.0668 = 0.9332

93.32% probability that a randomly selected score will be greater than 63.7.

5 0
3 years ago
If x = 4 and y = 7, evaluate the - following expression: 20 +2(3y - 4x)​
Andrei [34K]

Answer:

30

Step-by-step explanation:

20+2(3*7 - 4*4)

20+2(21-16)

20+2*5

20+10

30

8 0
3 years ago
Read 2 more answers
(4a-3b) ^2<br><br><br> The last part represents squared
madam [21]

Answer: (4a - 3b)2

Step-by-step explanation:it stays the same because there is no like terms

5 0
3 years ago
Which set represents the range of the function shown?<br> {(8, 2), (6, 5), (4, 7), (11, −2)}
kakasveta [241]
The second numbers in each of the ordered pairs is the range
3 0
3 years ago
Maddie converts z = 8(cos(300°) + isin(300°)) into rectangular form z = a + bi and determines that a = 4 and b = 4 StartRoot 3 E
Anastaziya [24]

Answer:

Option C) The value of a is correct, but the value of b is incorrect.

Step-by-step explanation:

z = 8(cos(300°) + isin(300°))

z = 8cos(300°) + 8isin(300°)

z = 4 + i(-4\sqrt{3})\\z=4-i(4\sqrt{3} )\\

So we can see that a = 4 which is correct but b = -4\sqrt{3} and b in the question says it is b 4\sqrt{3} so its incorrect so Option C is your answer.

8 0
2 years ago
Read 2 more answers
Other questions:
  • One-half a number minus 6 is 4. what is the number​
    13·1 answer
  • Dan recently bought a new mountain bike for $550. His friend works
    8·1 answer
  • Slope intercept form 3x-10y=-6
    11·1 answer
  • What’s the order from<br> Least to greatest
    5·1 answer
  • Y=-2x-3,y=-2x+2 how many solutions does the system have
    15·1 answer
  • Allex has a $20 bill. At the corner store, he buys a
    11·1 answer
  • Which ordered pair is a solution to the equation y+1=3(x-4)
    9·1 answer
  • Are these answers right?
    6·1 answer
  • Write the formula for the volume of a cone V=1/3 π r^2 h in terms of h. Find the height h of a cone with volume V= 32π cm^3 and
    14·2 answers
  • If a man making $22 an hour gets a 20% raise, she will make an additional 1/10 of her salary an hour.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!