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
Molodets [167]
3 years ago
8

Darcy built the dollhouse shown. What is the volume of the first floor? What is the Volune of the attic space?

Mathematics
1 answer:
BigorU [14]3 years ago
6 0
The volume of the first floor is 9000 inches cubed.
20*45*10=9000
The volume of the attic is 360 inches cubed.
8*45=360
You don't have to divide by two as there are two triangular prisms.
You might be interested in
A BULLET SHOT FROM A PISTOL CAN BE ANALYZED THROUGH:
Nataliya [291]

Answer:

. A LINEAR REGRESSION is your answer

8 0
3 years ago
Read 2 more answers
Suppose the test scores on an exam show a normal distribution with a mean of 82 and a standard deviation of
Zanzabum

Answer:

a) Between 74 and 90

b) 81.86% of the scores are between 78 and 90

Step-by-step explanation:

a) According to the Empirical Rule, in a normal distribution, 95% of the data are within 2 standard deviations of the mean. Therefore, the range that 95% of the scores fall in is between 82-4(2)=74 and 82+4(2)=90.

b) The percent of scores that are between 78 and 90 is: normalcdf(lower,upper,μ,σ) = normalcdf(78,90,82,4) = 0.8185946784 ≈ 0.8186, or about 81.86% of the scores.

5 0
3 years ago
Use stoke's theorem to evaluate∬m(∇×f)⋅ds where m is the hemisphere x^2+y^2+z^2=9, x≥0, with the normal in the direction of the
ludmilkaskok [199]
By Stokes' theorem,

\displaystyle\int_{\partial\mathcal M}\mathbf f\cdot\mathrm d\mathbf r=\iint_{\mathcal M}\nabla\times\mathbf f\cdot\mathrm d\mathbf S

where \mathcal C is the circular boundary of the hemisphere \mathcal M in the y-z plane. We can parameterize the boundary via the "standard" choice of polar coordinates, setting

\mathbf r(t)=\langle 0,3\cos t,3\sin t\rangle

where 0\le t\le2\pi. Then the line integral is

\displaystyle\int_{\mathcal C}\mathbf f\cdot\mathrm d\mathbf r=\int_{t=0}^{t=2\pi}\mathbf f(x(t),y(t),z(t))\cdot\dfrac{\mathrm d}{\mathrm dt}\langle x(t),y(t),z(t)\rangle\,\mathrm dt
=\displaystyle\int_0^{2\pi}\langle0,0,3\cos t\rangle\cdot\langle0,-3\sin t,3\cos t\rangle\,\mathrm dt=9\int_0^{2\pi}\cos^2t\,\mathrm dt=9\pi

We can check this result by evaluating the equivalent surface integral. We have

\nabla\times\mathbf f=\langle1,0,0\rangle

and we can parameterize \mathcal M by

\mathbf s(u,v)=\langle3\cos v,3\cos u\sin v,3\sin u\sin v\rangle

so that

\mathrm d\mathbf S=(\mathbf s_v\times\mathbf s_u)\,\mathrm du\,\mathrm dv=\langle9\cos v\sin v,9\cos u\sin^2v,9\sin u\sin^2v\rangle\,\mathrm du\,\mathrm dv

where 0\le v\le\dfrac\pi2 and 0\le u\le2\pi. Then,

\displaystyle\iint_{\mathcal M}\nabla\times\mathbf f\cdot\mathrm d\mathbf S=\int_{v=0}^{v=\pi/2}\int_{u=0}^{u=2\pi}9\cos v\sin v\,\mathrm du\,\mathrm dv=9\pi

as expected.
7 0
3 years ago
Please help is for now
cupoosta [38]
3 because I did the quiz and got it right txt me if you need help
8 0
3 years ago
Read 2 more answers
How to solve this problem
RSB [31]
Holy @$#% THAT LOOKS HARD! Sorry, I can't help I don't know that math yet. 
5 0
4 years ago
Other questions:
  • -5x + 9y = 14<br> -3x + 9y = -6
    7·1 answer
  • The table below shows the values of y for different values of x:
    7·2 answers
  • One of the angles formed by two intersecting lines is 30°. What is the measure of the other three angles?
    9·1 answer
  • What is 4x^3 • 5x^4y^2 expanded
    10·1 answer
  • How do you do a 3-step equation?
    14·1 answer
  • Solve 7w – 3r = 15 for r. Show your work.
    12·2 answers
  • Which expressions are equivalent to 2^5.2^4? Check all that apply.
    10·2 answers
  • Solve my problem plz
    15·2 answers
  • 2. Find two equivalent ratios of the following ratios: a) 27 : 9 b) 7 : 35
    12·1 answer
  • Determine if (2, -1) is a solution to the system of equations:
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!