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
Tasya [4]
2 years ago
12

Help plz will mark Brainly

Mathematics
1 answer:
irina1246 [14]2 years ago
3 0

Answer:

126 inches

Step-by-step explanation:

If your drawing is on a 1 : 40 scale, to find the scale's height, divide the ride's height by 40.

420 / 40 = 10.5

So the drawing will be 10.5 feet tall.

To convert 10.5 feet to inches, multiply it by 12.

10.5 * 12 = 126 inches

You might be interested in
4) y =<br> Justify:<br> 63°<br> у
kenny6666 [7]

Answer:

y = 63° because they are alternate angles.

3 0
2 years ago
Which polynomial equations have -i as one of their roots? A) x3 + 5x2 - 20 = 0
kirill115 [55]
The 2nd, 3rd, and 4th ones
6 0
3 years ago
Read 2 more answers
One car alarm is set to go off every 10 seconds. Another car alarm is set to go off every 5 seconds, and a third car alarm is se
erma4kov [3.2K]

Answer:

20 seconds

Step-by-step explanation:

Car A = every 10 seconds

Car B = every 5 seconds

Car C = every 4 seconds

If they all start to go off at the same time due to a loud clap of thunder, how long will it take until they all sound at the same time again?

To determine how long will it take until they all sound at the same time again, find the lowest common multiples of cars alarm time

Car A (every 10 seconds) = 20, 30, 40, 50, 60, 70, 80, 90

Car B (every 5 seconds) = 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60

Car C (every 4 seconds) = 8, 12, 16, 20, 24, 28, 32, 36, 40

The lowest common multiples of the cars alarm time is 20 seconds.

Therefore, it will take 20 seconds for they all sound at the same time again

8 0
3 years ago
The mean annual salary for intermediate level executives is about $74000 per year with a standard deviation of $2500. A random s
lidiya [134]

Answer:

11.51% probability that the mean annual salary of the sample is between $71000 and $73500

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

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.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question, we have that:

\mu = 74000, \sigma = 2500, n = 36, s = \frac{2500}{\sqrt{36}} = 416.67

What is the probability that the mean annual salary of the sample is between $71000 and $73500?

This is the pvalue of Z when X = 73500 subtracted by the pvalue of Z when X = 71000. So

X = 73500

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

By the Central Limit Theorem

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

Z = \frac{73500 - 74000}{416.67}

Z = -1.2

Z = -1.2 has a pvalue of 0.1151

X = 71000

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

Z = \frac{71000 - 74000}{416.67}

Z = -7.2

Z = -7.2 has a pvalue of 0.

0.1151 - 0 = 0.1151

11.51% probability that the mean annual salary of the sample is between $71000 and $73500

8 0
2 years ago
Answer the question on the attachement
Mama L [17]
Answer: 6 cups of water
7 0
3 years ago
Other questions:
  • As the weight of purchased items increases, the shipping charges increase, as shown in the table below. Weight, in oz Total Ship
    5·2 answers
  • How many degrees is one rotation that will put a regular pentagon back on top of itself?
    13·1 answer
  • Round to the nearest hundredth (Geometric Series problem)
    11·1 answer
  • What is m2 + m 23? Pls I need ASAP
    7·1 answer
  • Two less than 2 times a number is the same as the number plus 64
    5·2 answers
  • Find the prime factorization of 108
    7·1 answer
  • Which statement is true regarding the graphed
    9·1 answer
  • Find the length of CD
    13·2 answers
  • If 4x²+ y²= 40 and xy = 6 , find the value of (2x − y).
    11·2 answers
  • I think it is a and c, but I would feel better if I had confirmation lol
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!