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
Alchen [17]
3 years ago
9

This is a calculus question.

Mathematics
2 answers:
yuradex [85]3 years ago
7 0

Answer:

= 2 cm^2/sec

Step-by-step explanation:

side of cube ---- x cm

volume = x^3

d(volume)/dt = 3x^2 dx/dt

when c = 20, d(volume)/dt = 10 cm^3/sec

10 = 3(20^2) dx/dt

dx/dt = 10/1200 = 1/120 cm/sec

Surface area = SA = 6x^2

d(SA)/dt = 12x dx/dt

so when x = 20, as above

d(SA)/dt = 12(20)(1/120) cm^2/sec

= 2 cm^2/sec

DiKsa [7]3 years ago
3 0

Answer:

2 cm^2/sec

Step-by-step explanation:

side of cube ---- x cm

volume = x^3

d(volume)/dt = 3x^2 dx/dt

when c = 20, d(volume)/dt = 10 cm^3/sec

10 = 3(20^2) dx/dt

dx/dt = 10/1200 = 1/120 cm/sec

Surface area = SA = 6x^2

d(SA)/dt = 12x dx/dt

so when x = 20, as above

d(SA)/dt = 12(20)(1/120) cm^2/sec

= 2 cm^2/sec

You might be interested in
Five more than one third of a number is -2. Find the number
Art [367]
1/3x + 5 = -2 is the way to set up the equation…. You got this!
7 0
3 years ago
Velma needs to crate 59 watermelons. If she can fit 7 watermelons in each crate, how many crates does she need?
Mademuasel [1]

Answer:

The answer would be nine

Explanation:

59 divided by 7 is 8 with 3 remaning but all must be included so you have anothr crate for the remaining the and sice 8+1=9. Velma needs 9 crates. Hope this Helps!!

5 0
3 years ago
Remove the brackets and simplify
Komok [63]

Answer:

5x - 7 {x}^{2}  -  {(2x)}^{2}  \\  = ( {2}^{2}  {x}^{2} ) - 7 {x}^{2}  + 5x \\  = 4 {x}^{2}  - 7 {x}^{2}  + 5x \\  = x(4x - 7x + 5) \\  = x( 5 - 3x) \\  = { \underline{ \underline{ \:  \:  5x - 3 {x}^{2}  \:  \: }}}

7 0
3 years ago
Read 2 more answers
What is the equivalent fraction for 4/8
solmaris [256]
You are able to divide or mutiply both so let's divide. Divide each by four to get1/2. hope this helped.
5 0
4 years ago
Read 2 more answers
Which statement is true about the circumference of a circle?
Gemiola [76]
The answer should be d because the circumference is 2 time pie r squared
6 0
3 years ago
Read 2 more answers
Other questions:
  • HELP ME PLEASE!!!!
    9·1 answer
  • emma drew truangke ABC that is shown below. Emma reflected the triangle across the x axis and then rotated the figure 90 degrees
    13·1 answer
  • Need help with this problem ​
    13·1 answer
  • The number of chips of different colors in Fran's bag is shown below: 9 red chips 4 green chips 15 yellow chips Fran takes out a
    9·1 answer
  • 11x^2-2x^3+7 and -x^2+6x-7 as sum
    7·1 answer
  • Find the number that belongs in the green box. <br><br>round your answer to the nearest tenth.​
    6·1 answer
  • 1. Ten times the sum of -270 and a number gives -20.​
    7·1 answer
  • What inequality is represented by the graph below
    14·1 answer
  • Find the length of segment AB
    9·1 answer
  • (-6,-4), (3,-4) find the slope
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!