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oksano4ka [1.4K]
3 years ago
6

Can someone pls help me

Mathematics
1 answer:
MAVERICK [17]3 years ago
6 0
Standard deviation I think
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In a certain city, the daily consumption of water (in millions of liters) follows approximately a gamma distribution with α = 2
Ne4ueva [31]

Answer:

The probability that on any given day the water supply is inadequate 0.1991

Step-by-step explanation:

Given

α = 2 and β = 3

As per Gamma distribution Function

P(X>9)= 1-P(X\leq 9)\\

Expanding the function and putting the given values, we get -

[tex]1 - \int\limits^9_0 {f(x;2,3)} \, dx \\1- \int\limits^0_0 {\frac{1}{9}xe^{\frac{-x}{3} } \, dx\\\\= 1- \frac{1}{9} [x(-3e^{\frac{-x}{3}}) -\int\limits {(-3e^{\frac{-x}{3}})} \, dx]^9_0= 1- 1/9 [x(-3e^{\frac{-x}{3}}) -9e^{\frac{-x}{3}})} \, dx]^9_0\\1-((\frac{-1}{3} *9*e^({\frac{-9}{3}})- e^(\frac{-9}{3}))- ((\frac{-1}{3} *0*e^(\frac{-9}{3})-e^{\frac{-0}{3}})\\1-((-3e^{\frac{-9}{3} }-e^{\frac{-9}{3}}-(0-1))\\1-(1-4e^{-3})\\1-(1-0.1991)\\1-0.8009\\0.1991

The probability that on any given day the water supply is inadequate 0.1991

5 0
4 years ago
Find the value of x. Show work if you can
vova2212 [387]

Answer:

Step-by-step explanation:

number of side = n =7

Sum of all the angles of  given polygon = (n -2)*180 = 5 *180 = 900

x + 140 +133 +145 + 117 + 119 + 125 = 900

                                             x +  779 = 900

                                                    x     = 900 - 779

x = 121

4 0
3 years ago
( − 9 , 7 ),(−6,−3)
lina2011 [118]

Answer: If you wanting to find the slope, the answer would be m = -10/3

Step-by-step explanation: Use the slope formula to find the slope m.

Hope this helps you out! ☺

3 0
4 years ago
What equation could be written for this table?
kkurt [141]

Answer:

y = 3 + 1/2 * x

Step-by-step explanation:

7 0
3 years ago
If yo have a 54% in a class and get a 0 on the exam what will your grade be if the exam is worth 15%
maw [93]
If the exam is worth (only!) 15%, then the class average is worth (100-15)=85%.

The grade will then be 54*0.85+0*0.15= 45.9%

The letter grades (if any) will vary from school to school.
5 0
3 years ago
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