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
11Alexandr11 [23.1K]
2 years ago
6

The circulation time of a mammal (the average time it takes for all the blood in the body to circulate once and return to the he

art) is proportional to the fourth root of the body mass of the mammal. Circulation time, T, is measured in seconds and body mass, m, is measured in kilograms.
(a) If the proportionality constant is 17.4, write a formula for the circulation time of a mammal. Use a lower case m.

(b) The body mass of a growing child is 38 kg and is increasing at a rate of 0.2 kg/month. What is the rate of change of the circulation time of the child? Round your answer to 3 decimal places.
_______sec/month
Mathematics
2 answers:
cricket20 [7]2 years ago
6 0
T=17.4\sqrt[4]{m}
Differentiate with respect to time s:
\frac{dT}{ds}=\frac{17.4}{4m^{3/4}}\frac{dm}{ds}
⇒\frac{dT}{ds}=\frac{4.35}{m^{3/4}}\frac{dm}{ds}
Plug in m=38 and \frac{dm}{ds}=0.2:
\frac{dT}{ds}=\frac{4.35}{38^{3/4}}*0.2
⇒\frac{dT}{ds}≈0.057 sec/month
dsp732 years ago
5 0

Answer:

(a) T=17.4\sqrt[4]{m}

(b) 0.057 sec/month.

Step-by-step explanation:

Let T is the circulation time of a mammal in seconds and m is the body mass in kilograms.

It is given that the circulation time of a mammal is proportional to the fourth root of the body mass of the mammal.

T\propto \sqrt[4]{m}

T=k\sqrt[4]{m}

where k is constant of proportionality.

(a) The proportionality constant is 17.4. So, the circulation time of a mammal is

T=17.4\sqrt[4]{m}

(b)

The above equation can be written as

T=17.4m^{\frac{1}{4}}

Differentiate with respect to time t.

\frac{dT}{dt}=17.4(\frac{1}{4}m^{\frac{1}{4}-1}\frac{dm}{dt})

\frac{dT}{dt}=4.35m^{-\frac{3}{4}}\frac{dm}{dt}

Substitute m=38 and \frac{dm}{dt}=0.2 in the above equation.

\frac{dT}{dt}=4.35(38)^{-\frac{3}{4}}(0.2)

\frac{dT}{dt}=0.0568436

\frac{dT}{dt}\approx 0.057

Therefore, the rate of change of the circulation time of the child is 0.057 sec/month.

You might be interested in
If y=3x+4 were changed to y=5x+4 ,how would the graph of the new function compare with the first one ?
Pepsi [2]
The slope of the line would be positive 5/1 instead of positive 3/1. the y-intercept stays the same.
6 0
3 years ago
Read 2 more answers
What are the first four terms in the nth term<br> n(2n + 1)
Bingel [31]

Answer:

0

3

10

21

36

Explination:

0 x anything is still zero, but I don't know if that counts.

1 (2+1) = 3

2 (4+1) = 10

3 (6+1) = 21

4 (8+1) = 36

6 0
2 years ago
 Solve the system of inequalities and indicate all the integers which are in the solution set:
elena-s [515]
1.) a>10
2.) a<3.5
How I got it: 1.) Subtract 3 from both sides, leaving -2a<10.
2.) Divide by -2 from both sides, remember to flip the inequality sign when dealing with negatives. This leaves you with a>10.
For number 2.) I divided both sides by 5, leaving a<3.5, though this answer may be wrong.
8 0
3 years ago
4. The distance covered by the cook in Triangle A equals _______________ eighteen-inch steps.
laiz [17]
We know that

<span>to convert feet to inches we must multiply by 12

</span>4. The distance covered by the cook in Triangle A equals 
a) fridge and stove-----------> 5*16*12=960 in
b) fridge and sink-------------> 10*22*12=2640 in
c) sink and stove--------------> 15*16*12=2880 in
then add, 960 + 2640 + 2880 = 6480 in

the answer asks for the distance in 18 in lengths 
so divide 6480 by 18 -------------> 6480/18=360 

the answer part N 4) is 360 eighteen-inch steps
<span>
5. The distance covered by the cook in Triangle B equals 
a) fridge and stove-----------> 5*16*12=960 in
b) fridge and sink-------------> 10*16*12=1920 in
c) sink and stove--------------> 15*16*12=2880 in
</span><span>then add, 960 + 1920 + 2880 = 5760 in
</span>
<span>the answer asks for the distance in 18 in lengths
so divide 5760 by 18 -------------> 5760/18=320 
</span><span>
the answer part N 5) is 320 </span>eighteen-inch steps

6. The distance covered by the cook in Triangle A equals 
a) fridge and stove-----------> 5*15*12=900 in
b) fridge and sink-------------> 10*22*12=2640 in
c) sink and stove--------------> 15*15*12=2700 in
then add, 900 + 2640 + 2700 = 6240 in

the answer asks for the distance in 18 in lengths 
so divide 6240 by 18 -------------> 6240/18=346.67------> 347

the answer part N 6) is 347 eighteen-inch steps<span>

</span>
3 0
3 years ago
A model car is made to a scale of 1:50 (model: real). If the model has a length of 10 cm, calculate the length of the real car (
Alex_Xolod [135]

Answer:

5 m

Step-by-step explanation:

A model car is made to a scale of 1:50 (model: real).

If the model has a length of 10 cm, calculate the length of the real car (answer in meters).

We have a scale of :

model: real = 1:50

The model has a length of 10cm

Hence:

1 cm = 50 cm

10 cm = x cm

Cross Multiply

x cm × 1cm = 10 cm × 50 cm

x cm = 10 cm × 50 cm/1cm

x cm = 500 cm

The length of the real car is 500cm

Converting the length of the real car to meters

100cm = 1 m

500 cm = x m

Cross Multiply

100cm × x m = 500 cm × 1 m

x m = 500 cm × 1 m/100 cm

x m = 5 m

The Length of the real car in meters is 5m

4 0
2 years ago
Other questions:
  • What is the hundred of 50,000?
    15·1 answer
  • The speed of the wind is changing according to the function V(t)=-1/2+30, where t=time in minutes after 6:00 p.m and V(t) = wind
    11·1 answer
  • what is the common difference between succeseive terms in this sequence? 9 , 2.5 , -4 , -10.5 , -17 ....
    13·1 answer
  • In a Harris poll of 514 human resource professionals, 90% said that the appearance of a job applicant is most important for a go
    15·1 answer
  • Simplify the radical of 10+10
    7·2 answers
  • Solve 3x + 7 = 3(x - 2)
    5·2 answers
  • 2. Which equation in standard form has a graph that passes through the point (-5,8) and has a
    11·1 answer
  • Surface area!!!!!!!!!!!!!!
    15·1 answer
  • The diagram shows a triangle.<br> 490<br> 880<br> What is the value of v?<br> V =
    7·2 answers
  • What is the greatest common monomial factor of _________ ?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!