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
yulyashka [42]
2 years ago
13

Please help photos for my math

Mathematics
1 answer:
Talja [164]2 years ago
8 0

Answer:

1. Surface Area = 122                Volume = 84

2. Surface Area = 1632             Volume = 2880

3. Surface area = 168                Volume = 144

4. Volume = 1350\pi

Step-by-step explanation:

1. This is a rectangular prism. To find the surface area it is the same thing. Find the area of all sides and add them together.  Because this is a rectangular prism most of the sides are equal so we will only need to find the area of three sides. To find the area of the right side, just do 4*3=12. That would be the same for the opposite side. Then to find the front side, do 7*4= 28. That would also be the same for the opposite side. Then to find the top side, do 7*3= 21. That is the same for the bottom side. Add them all together and you will get your answer. 28+28+21+21+12+12 = 122.

To find the volume of a rectangular prism the formula is V = l*w*h.

Plug in: V = 7*3*4 and then you will get 84.

2. This is a triangular prism. First find the area of the the triangular surface by multiplying the base x height and dividing by 2. (16*12)/2 = 96.  That is the same for the opposite side. Then find the area of the bottom rectangular surface. 12*30 = 360. Then find the area of the back rectangular surface. 16*30 = 480. Then find the area of the final base rectangle. 30*20 = 600. Add them together and you will get 1632. Basically, find the area of all sides and then add them together.

To find volume the formula is, V = (1/2)a*c*h

Fill that in: V = (1/2)16*12*30 and then you will get 2880.

3. This is a trapezoidal prism. To find the surface area you would find the area of all sides then add them together. To find the are of a trapezoid, the formula is: A = \frac{a+b}{2}h

Fill that in: A = \frac{4+12}{2}(6) and then you will get 48.

That is the same for the opposite side. Then you need to find the area of the rectangular side of the trapezoidal prism. 3*4= 12. This is also the same as the opposite side. The bottom side is 12*3= 36. The top side is 3*4= 12.

Add all of them together and you get 168.

1/2(4+12)*6

To find volume, V =  \frac{1}{2}h(b₁+b₂)h.

Fill in: V =  \frac{1}{2}6(12+4)3 and then you will get 144.

4. This is a cylinder. The formula to find the volume is A=\pir²h. Because you are leaving the answer in terms of pi, do not multiply pi into the equation.

So you would do r²h. 15² = 225. 225*6= 1350. So your answer would be 1350\pi.

You might be interested in
If you had 26/12 dollars, how much money would that be
Zolol [24]

Answer:

$2.17

Step-by-step explanation:

Our result when dividing 26 by 12 becomes 2.166666......

This is a problem,

Luckily, the question asks us to round to the nearest penny, or hundredths, for calculation's sake.

This brings our answer to 2 dollars and 17 cents

7 0
3 years ago
Need help asap!!!!!!!
Phoenix [80]

Answer:

d

Step-by-step explanation:


3 0
3 years ago
Please help! 50 points and i'll give brainliest!
Nitella [24]

if im correct its 70

3 0
3 years ago
Read 2 more answers
A math problem that is equal to 24,000
notka56 [123]
23,999 + 1

12,000 + 12,000

12,000 x 2

600 x 4

Can u mark me as brainliest plz
6 0
3 years ago
Read 2 more answers
Can somebody help I am really bad at this
harina [27]

Answer:

40 feet

Step-by-step explanation:

4+4+8+4+12+8

= 40 ft.

3 0
3 years ago
Other questions:
  • Is 6 a solution of x-8=-2
    7·2 answers
  • Is this right? I’ll mark brainliest if you’re correct
    10·1 answer
  • Plz help!
    14·1 answer
  • Reflex angle of 95 degrees
    12·1 answer
  • Mariam and Sana are excited that a new store just opened in town! They go together the first day it opens! Each time Mariam goes
    11·1 answer
  • Can a line have lines of symmetry like the first line in the picture
    15·1 answer
  • HELP! Factor and Write an equivalent expression for 36a - 16.<br><br> THANKS
    9·1 answer
  • Just give the answer
    8·1 answer
  • What is the median of this data set?<br><br> {16, 16, 16, 19, 20, 22, 23, 24, 24}
    8·1 answer
  • Solving Inequalities
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!