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zubka84 [21]
3 years ago
5

What is the rate of change on the table above A) -1/3 B) 1/2 C) -1/4 D) 1/5

Mathematics
1 answer:
nirvana33 [79]3 years ago
4 0

answer is option D

\frac{2}{10}  =  \frac{1}{5}  \\   \frac{4}{20}  =  \frac{1}{5}  \\   \frac{6}{30}  =  \frac{1}{5}  \\  \frac{8}{40}  =  \frac{1}{5}

so the answer is option D

please mark this answer as brainlist

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Ammonia at 70 F with a quality of 50% and a total mass of 4.5 lbm is in a rigid tank with an outlet valve at the bottom. How muc
Inessa05 [86]

Answer:

0.10865 killograms

Step-by-step explanation:

calculating the liquid mass of ammonia removed through the bottom value from a rigid tank at constant temperature.

Given:

temperature: T=70 F

quality : 50% = 0.5

initial mass: m1= 4.5 lbm

to find the removed liquid mass first we have to find total volume from which we can find remaining mass. as the tang is rigid the temperature and volume remains constant.

by taking the difference of mass we can determine the mass of liquid removed.

 we have two phases at temperature T= 70 F with specific volume for liquid  vf=0.02631 ft^3/lbm  and specific volume for vapor is  vg=2.3098 ft^3/lbm .

The Volume in the initial state is given by, (Using definition of specific volume)

                                          V= m1v1

 using v1=x(vf+vg)

                                    V= m1x(vf+vg)

substituting m1= 4.5 lbm\\ , vf= 0.02631 ft^3/lbm , vg=2.3098 ft^3/lbm

we get

        V= (4.5 lbm)(0.5)(0.02631 ft^3/lbm +2.3098 ft^3/lbm)  

finally          V=5.2625 ft^3  

we know the formula to find liquid mass is

mass =density *volume

density of ammonia is  0.73 kg/m^3

inserting the values into the formula we get the value for liquid mass removed through the valve.

m = (0.73 kg/m^3)*(5.25625 ft^3)

the final answer is

                           m= 0.10865 kg

4 0
4 years ago
Marcia can make 5 candles in an hour. Kevin can make only 4 candles in an hour, but he already has 7 completed candles. how can
garri49 [273]
Marcia can write an expression for the number of candles she will have at the end of "h" hours. She can also write an expression for the number of candles Kevin will have at the end of "h" hours. She can set the two expressions equal to each other and solve for "h", the number of hours until each has the same number of candles. 


<span>5h = 4h+7 </span>
<span>h = 7 … subtract 4h from each side </span>
<span>In 7 hours, each will have the same number of candles.</span>
7 0
4 years ago
Read 2 more answers
The radius of a circle is 11 millimeters find the diameter ​
xz_007 [3.2K]

Answer: 22

Step-by-step explanation: the diameter is twice radius so you multiply 11 x 2 giving you 22 as your answer

5 0
3 years ago
Read 2 more answers
The circumference of the earth is about 40050 km. Which of the following is the closest approximation of the diameter? Use 3.14
prohojiy [21]
D is the answer
40050 divided by 3.14 is 12754.77707
7 0
4 years ago
Two standard dice are rolled and their face values multiplied. What is the probability that the product is prime or ends in a 5?
icang [17]

Answer:

6/21

Step-by-step explanation:

1. First, check all the possible combinations for a pair of dice:

1-1

1-2 2-2

1-3 2-3 3-3

1-4 2-4 3-4 4-4

1-5 2-5 3-5 4-5 5-5

1-6 2-6 3-6 4-6 5-6 6-6

(Those are the numbers of the dice, separated by hyphons.)

2. Next, find out the products, since that is the info we need to go off of.

1

2 4

3 6 9

4 8 12 16

5 10 15 20 25

6 12 18 24 30 36

(those are all the products based on the same chart we saw above.)

3. Now, let's calculate the probability.

  • Find the amount of prime numbers. (1, 2, 3, 5) Looks like there are four total.
  • Find the amount of numbers that end in a five. (15, 25) There are two. I've skipped 5 because that is already on the list.
  • Find the total amount of numbers. There are 21 in our case.

4. There are 6 numbers that will satisfy our needs. (prime or ending in 5)

There are 21 total.

6/21

If you need decimal form, there is a

0.2857 chance.

Hope this helped.

8 0
4 years ago
Read 2 more answers
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