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IRINA_888 [86]
3 years ago
11

Please someone help me with this question

Mathematics
1 answer:
Nitella [24]3 years ago
5 0

Answer:3^2

Step-by-step explanation:

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A random variable r is normally distributed with a mean of 7 and a standard deviation of 1.5. Find the value of w so that P (8.8
a_sh-v [17]

Answer:

The answer is explained below

Step-by-step explanation:

Given that:

mean (μ) = 7 and standard deviation (σ) = 1.5.

The z score is used in statistic used to measure the number of standard deviation by which the raw score is above or below the mean value. It is given by:

z=\frac{x-\mu}{\sigma}, where\ x\ is\ the \ raw\ score

To find the Probability that x < 8.8, we first find the z score using:

z = \frac{x-\mu}{\sigma}=\frac{8.8-7}{1.5}=1.2

From the z tables, P(x < 8.8) = P(z < 1.2) = 0.8849 = 88.49%

4 0
3 years ago
Help me pls i really dk
kondaur [170]
I think its easier to work out part (c) first:-

People who liked anything except burger  = 3/8 + 1/4 + 1/5 =  33/40

So the fraction who liked burgers = 7/40.

7/40 of the total liked burgers   so total people surveyed = (40/7) * 126 =  720

ANswer to c is 720.

a) Number who liked  chicken and laksa = (3/8 + 1/4) * 720  =  450 Answer

b)  Number who liked pasta =  1/5 * 720  =  144

Therefore  144-126  =  18 more people liked pasta than burger , Answer.
7 0
3 years ago
Need help with functions
Komok [63]

Answer: ur right

Step-by-step explanation:

4 0
2 years ago
Plz help!! if f(x)=1/x and g(x)=x+3, which of the following is the graph of (f*g)(x)
Nataly [62]

Answer:

Step-by-step explanation:

the first one is correct

6 0
3 years ago
What is the the answer​
timofeeve [1]

Answer: x=r^2 + 10 r + 25

7 0
2 years ago
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