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wlad13 [49]
3 years ago
11

The amount of rainfall in january in a certain city is normally distributed with a mean of 4.3 inches and a standard deviation o

f 0.3 inches. find the value of the quartile q1. 1.1 4.2 4.1 4.5

Mathematics
1 answer:
Sholpan [36]3 years ago
7 0
We start by showing the position of the first quartile, Q1 on the normal distribution graph. Q1 happens at 25% of the data.

The graph is shown below

We are interested in the area to the left of Q1 and we know that the probability is 0.25

We can find out the value of z-score from the table as shown below 

The z-score when p=0.25 is 0.68

then changing this z-score into the actual value

-0.68= \frac{X-4.3}{0.3}
-0.204=X-4.3
X=4.096

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Yuliya22 [10]
To get the Area you need the Radius to get the Radius you need to divide 14 by 2 14/2=7

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7*7*3.14=153.86
4 0
3 years ago
Which is greater, 2 or -13?
sineoko [7]
Positive numbers are always greater than negative numbers.

Therefore 2 > -13. In words, 2 is greater than -13.
6 0
3 years ago
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PLEASE SHOW FULL SOLUTIONS !!!!! WILL MARK BRAINLIEST FOR THE BEST ANSWER. THANK YOU AND GOD BLESS.
zhenek [66]

Answer:

a = 8

b ≠ 18

Step-by-step explanation:

y = 4x - 7

2y = ax + b

For there to be no solution, the lines (if graphed) should be parallel meaning that their slopes are equal but the y-intercepts are different

y = mx +b is the equation of a line where m is the slope and b is the y-intercept

Multiply the first equation by 2

2y = 8x - 14

2y = ax + b

So a has to equal 8

b can be anything except 14 (otherwise the lines would be the same)

4 0
2 years ago
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The length of a rectangle is three times its breadth if the breadth is decreased by 2 m and breadth increased by 4 m the area of
White raven [17]

Answer:

Let the breadth is x, then the length is 3x.

<u>The area is:</u>

  • A = lw = 3x*x = 3x²

<u>The breadth is decreased by 2 m: </u>

  • w = x - 2

<u>The length is increased by 4m: </u>

  • l = 3x + 4

<u>The area is now:</u>

  • (x - 2)(3x + 4) = 3x² - 1/3(3x²)
  • 3x² +  4x - 6x - 8 = 2x²
  • x² - 2x - 8 = 0
  • x² - 2x + 1 = 9
  • (x - 1)² = 3²
  • x - 1 = 3
  • x = 4

The breadth was 4 m and the length  12 m

8 0
2 years ago
Thank you if you do help!:,)
egoroff_w [7]

Answer:

B

Step-by-step explanation:

PEMDAS

8 + 2^3 x 5

8 + 8 x 5

8 + 40

48

3 0
3 years ago
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