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
Nikitich [7]
3 years ago
15

The base of a solid in the xy-plane is the first-quadrant region bounded y = x and y = x^2. Cross sections of the solid perpendi

cular to the x-axis are equilateral triangles. What is the volume, in cubic units, of the solid?
My teacher isn't helpful at all and I'm starting to fail tests, please help
Mathematics
1 answer:
olga55 [171]3 years ago
7 0
He area of an equilateral triangle of side "s" is s^2*sqrt(3)/4. So the volume of the slices in your problem is 

<span>(x - x^2)^2 * sqrt(3)/4. </span>
<span>Integrating from x = 0 to x = 1, we have </span>
<span>[(1/3)x^3 - (1/2)x^4 + (1/5)x^5]*sqrt(3)/4 </span>
<span>= (1/30)*sqrt(3)/4 = sqrt(3)/120 = about 0.0144. </span>

<span>Since this seems quite small, it makes sense to ask what the base area might be...integral from 0 to 1 of (x - x^2) dx = (1/2) - (1/3) = 1/6. Yes, OK, the max height of the triangles occurs where x - x^2 = 1/4, and most of the triangles are quite a bit shorter...


</span>
You might be interested in
Please help me on the first table!!!
Nina [5.8K]

Answer:

67.50- 3.38; 70.88

98.75- 4.94; 103.69

399.79- 19.99; 419.78

1250.00- 62.50; 1312.50

12,500.00- 625; 13,125.00

Step-by-step explanation:

To find the tax amount you multiply the sale amount by the percentage of sales tax(which in this case would be 0.05). To get the total amount you just add the sale amount to the sales tax.

4 0
3 years ago
PLEASE HELP DUDE I AM NOT SMART ENOUGH FOR THIS
Nitella [24]

Answer:

a

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Graph both functions to find the solution(s) to the system.
konstantin123 [22]

graphed it with desmos (free as app and website).

the solutions are in the screenshot

(1, 3)

(3, 7)

5 0
3 years ago
The point X : (19, 7) is dilated with a scale factor of k = 18 with its center
kifflom [539]

Answer:multiple

Step-by-step explanation:

Research

6 0
3 years ago
Read 2 more answers
Find the coordinates of the midpoint of the segment whose endpoints are H(6, 4) and K(2, 8).
Serhud [2]
The midpoint formula is ( x + x / 2, y + y / 2) 
so....
6+ 2 = 8 / 2 = 4
4 + 8 = 12 / 2 = 6
the midpoint is (4, 6)
3 0
3 years ago
Read 2 more answers
Other questions:
  • Circut A has twice the resistance of circut B. The voltage is the same in each circut. Which circut has the higher current?
    10·1 answer
  • Solve 12 – (2 × 3)a.6b.12c.12(2)d. 2 to the 3rd power
    7·1 answer
  • 2 x t 5 y = 10 ( solve for y )
    14·1 answer
  • the coordinates of the endpoints of CE are C(-3, -7) and E(7, -2). point M (3, -4) is on CE. what is the ratio of CM:ME?
    15·1 answer
  • Is the following statement true or false? A line is one-dimensional.
    7·1 answer
  • I WILL MARK YOU AS BRAINLIEST IF YOU ANSWER CORRECTLY!!!!
    10·2 answers
  • Figure EFGH is transformed to E’F’G’H’, as shown:
    6·1 answer
  • Find the product of 5×8000=5× blank thousands = thousands
    6·1 answer
  • Determine another point on the line given two points on the line.<br> (0,5), (4,1)
    6·2 answers
  • Find The largest integer which is a factor of both 308 and 952.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!