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
Wewaii [24]
3 years ago
15

Water use in the summer is normally distributed with a mean of 311.4 million gallons per day and a standard deviation of 40 mill

ion gallons per day. City reservoirs have a combined storage capacity of 350 million gallons. The probability that a day requires more water than is stored in city reservoirs is P(X > 350)= 1 - P (Z < b). What is the value of b? Please report your answer in 3 decimal places.
Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
4 0

Answer: 0.965

Step-by-step explanation:

Given : Water use in the summer is normally distributed with

\mu=311.4\text{ million gallons per day}

\sigma=40 \text{ million gallons per day}

Let X be the random variable that represents the quantity of water required on a particular day.

Z-score : \dfrac{x-\mu}{\sigma}

\dfrac{350-311.4}{40}=0.965

Now, the probability that a day requires more water than is stored in city reservoirs is given by:-

P(x>350)=P(z>0.965)=1-P(z

We can see that on comparing the above value to the given P(X > 350)= 1 - P(Z < b) , we get the value of b is 0.965.

You might be interested in
If a foosball table is 3cm longer then twice the width. Write a simplified expression for the area of the foosball table
djverab [1.8K]
Your expression is A = (L + 3) x (2w) x h
5 0
3 years ago
Which angles shown in the drawing are supplementary
Arte-miy333 [17]
In order to answer this, we need an image to be able to see what they look like.
5 0
3 years ago
Solve for x and y in the parallelogram
Lubov Fominskaja [6]

Answer:

x=3

y=6

Step-by-step explanation:

Hope this helps! :)

4 0
3 years ago
Consider f and c below. f(x, y) = x2 i + y2 j c is the arc of the parabola y = 2x2 from (−1, 2) to (1, 2) (a) find a function f
Korvikt [17]
If there is some scalar function f(x,y) such that

\nabla f(x,y)=\mathbf f(x,y)=x^2\,\mathbf i+y^2\,\mathbf j

then we want to find f such that

\dfrac{\partial f}{\partial x}=x^2\implies f(x,y)=\dfrac{x^3}3+g(y)
\dfrac{\partial f}{\partial y}=y^2=\dfrac{\mathrm dg}{\mathrm dy}\implies g(y)=\dfrac{y^3}3+C
\implies f(x,y)=\dfrac{x^3}3+\dfrac{y^3}3+C

So the vector field \mathbf f(x,y) is conservative, which means the fundamental theorem applies; the line integral of \mathbf f along any path \mathcal C parameterized by some vector-valued function \mathbf r(t) over a\le t\le b is given by

\displaystyle\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=\int_{t=a}^{t=b}\mathbf f(\mathbf r(t))\cdot\dfrac{\mathrm d\mathbf r}{\mathrm dt}\,\mathrm dt=f(\mathbf r(b))-f(\mathbf r(a))

In this case,

\displaystyle\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=f(1,2)-f(-1,2)=\dfrac23
5 0
3 years ago
Verify experimentally that the angle opposite to the longer side is greater than
Veronika [31]

Answer:

If two sides of a triangle are unequal, the angle opposite to the longer side is larger (or greater). You may prove this theorem by taking a point P on BC such that CA = CP.

Step-by-step explanation:

That's how you can prove which side is bigger

6 0
3 years ago
Other questions:
  • The area of a square is 36 cm2. which represents the side length of the square?
    11·2 answers
  • ANSWER ASAPPPPP PLSS
    10·1 answer
  • A rhombus has sides 10 cm long and an angle of 60 degrees. Find the distance between a pair of opposite sides.
    9·2 answers
  • Point E is on line segment DF. Given DE=9 and DF=11, determine the length EF.
    14·1 answer
  • What is the slope-intercept equation of y-intercept = (0, -1) slope = -2
    14·2 answers
  • HELP PLZ ILL GIVE U BRAINS :)
    10·2 answers
  • Multiply the following decimal numbers 1.3×6​
    11·1 answer
  • Fractions equivalent to 6/12 choose all correct 1)1/2 2)2/4 3)3/9 4)1/6 5)4/10
    6·2 answers
  • HELP ASAP PLS IF RIGHT GET BRANLY
    6·2 answers
  • Help me and thank you
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!