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
victus00 [196]
3 years ago
13

A 20,000 gallon tank is 3/4full. If the drain valve on this tank allows 2.5 gallons of water to be drained per minute, about how

many hours will it take to drain the tank?
Mathematics
1 answer:
patriot [66]3 years ago
6 0

Answer:

100 Hours

Step-by-step explanation:

since the tank has 15,000 gallons of water. it drains at a rate of 150 gallons per hour so 15,000 divided by 150 equals 100

You might be interested in
This bar graph would be MOST useful in a report about
yarga [219]
How the south consistently votes democratic
3 0
3 years ago
Read 2 more answers
Use the formula C = 2(3.14)r to find the radius, r, for a circle with a circumference of 125 centimeters. Round your answer to t
mihalych1998 [28]
125/3.14 = 6.31 radius
6 0
3 years ago
What is the surface area
nexus9112 [7]

Answer:

A 1759 sq. units

Step-by-step explanation:

to find the surface area of a closed cylinder the formula is

2πr² + πdh

r = radius = 10

d = diameter = 10 + 10 = 20

2 x 3.14 x 10² + 3.14 x 20 x 18

628.3 + 1130.94 = 1759.24

ans = 1759

5 0
3 years ago
The concentration of particles in a suspension is 50 per mL. A 5 mL volume of the suspension is withdrawn. a. What is the probab
kolezko [41]

Answer:

(a) 0.6579

(b) 0.2961

(c) 0.3108

(d) 240

Step-by-step explanation:

The random variable <em>X</em> can be defined as the number of particles in a suspension.

The concentration of particles in a suspension is 50 per ml.

Then in 5 mL volume of the suspension the number of particles will be,

5 × 50 = 250.

The random variable <em>X</em> thus follows a Poisson distribution with parameter, <em>λ</em> = 250.

The Poisson distribution with parameter λ, can be approximated by the Normal distribution, when λ is large say λ > 10.  

The mean of the approximated distribution of X is:

μ = λ  = 250

The standard deviation of the approximated distribution of X is:

σ = √λ  = √250 = 15.8114

Thus, X\sim N(250, 250)

(a)

Compute the probability that the number of particles withdrawn will be between 235 and 265 as follows:

P(235

                             =P(-0.95

Thus, the value of P (235 < <em>X</em> < 265) = 0.6579.

(b)

Compute the probability that the average number of particles per mL in the withdrawn sample is between 48 and 52 as follows:

P(48

                             =P(-0.28

Thus, the value of P(48.

(c)

A 10 mL sample is withdrawn.

Compute the probability that the average number of particles per mL in the withdrawn sample is between 48 and 52 as follows:

P(48

                             =P(-0.40

Thus, the value of P(48.

(d)

Let the sample size be <em>n</em>.

P(48

                             0.95=P(-z

The value of <em>z</em> for this probability is,

<em>z</em> = 1.96

Compute the value of <em>n</em> as follows:

z=\frac{\bar X-\mu}{\sigma/\sqrt{n}}\\\\1.96=\frac{48-50}{15.8114/\sqrt{n}}\\\\n=[\frac{1.96\times 15.8114}{48-50}]^{2}\\\\n=240.1004\\\\n\approx 241

Thus, the sample selected must be of size 240.

5 0
3 years ago
Gravitational force acts on all object in proportion to their masses. Why then, a heavy object does not fall faster than a light
nordsb [41]
Because force= acceleration x mass Acceleration is constant for a body of any mass since force is exactly proportional to mass.
7 0
2 years ago
Read 2 more answers
Other questions:
  • Suppose that rather than flipping a coin, one rolls a die. if the value is 1, 2, 3, or 4, the player wins $1. if it is 5 or 6, t
    7·1 answer
  • What is "K" in math
    10·2 answers
  • Ivan found the change in a scale factor. His work is shown below. What error did Ivan make?
    13·2 answers
  • 44. The length of a road is 380 m, correct to the nearest 10 m. Maria runs along this road at an average speed of 3.9 m/s. This
    6·1 answer
  • What is the circumference of a circle with a radius of 56 feet?<br> feet<br> (Use 3.14 for Pi.)
    15·2 answers
  • A doctor observes a graph that shows the electrical activity (in volts) of the heart of a patient over a period of time (in seco
    11·2 answers
  • I need help please. The picture
    8·2 answers
  • If Sam &amp; Jack have 3 apples and Sam gives two away BUT Jack buys two more apples, how many apples does Sam &amp; Jack have n
    9·1 answer
  • Find the perimeter of a square with sides that measure (2/3)g centimeters.
    14·2 answers
  • What is the area? please help. this would be my last question
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!