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
Galina-37 [17]
3 years ago
12

What’s the answer?and how do you get it

Mathematics
1 answer:
Kay [80]3 years ago
7 0

the solid is made up of 2 regular octagons, 8 sides, joined up by 8 rectangles, one on each side towards the other octagonal face.

from the figure, we can see that the apothem is 5 for the octagons, and since each side is 3 cm long, the perimeter of one octagon is 3*8 = 24.

the standing up sides are simply rectangles of 8x3.

if we can just get the area of all those ten figures, and sum them up, that'd be the area of the solid.

\bf \textit{area of a regular polygon}\\\\ A=\cfrac{1}{2}ap~~ \begin{cases} a=apothem\\ p=perimeter\\[-0.5em] \hrulefill\\ a=5\\ p=24 \end{cases}\implies A=\cfrac{1}{2}(5)(24)\implies \stackrel{\textit{just for one octagon}}{A=60} \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \stackrel{\textit{two octagon's area}}{2(60)}~~+~~\stackrel{\textit{eight rectangle's area}}{8(3\cdot 8)}\implies 120+192\implies 312

You might be interested in
Norm has $15,000 to deposit. His daughter is a junior in high school and plans to go to college. Recommend the best way for Norm
galina1969 [7]

Answer:

A money market account paying 3.5% interest, renewable for three-month commitments.

6 0
2 years ago
Read 2 more answers
a college freshman started the year with $4000 in spending money and after three months,she has $2800 left.assume that she will
gulaghasi [49]
Let's find out how much she spent every month.

4000 (starting money) - 2800 (remaining money) = 1200 spent over 3 months

1200/3 = 400 per month was spent

So if she continues to spend 400 a month?

How many months are left? 12 (months of the year) - 3 (months she already spent) = 9

So 9 (remaining months) * 400 (amt per month) = 3600 she'll spend at the going rate over 9 months.

But she only has 2800 left.

2800 (remaining) - 3600 (estimated total of spending) = -800

So she will be 800$ in debt at the end of the year at the current rate.
3 0
3 years ago
Find two positive numbers whose difference is 17 and whose product is 1410
Dafna11 [192]

Answer:

30 and 47

their difference is 17 and when multiplied equal 1410

4 0
3 years ago
What is x-31=112<br><br><br>please help​
Oliga [24]

Answer:

143

Step-by-step explanation:

x-31=112

Add 31 to both sides,

x - 31 = 112

  +31    +31

-31 and +31, cancel out so we're left with...

x = 143

5 0
2 years ago
Read 2 more answers
Which of the following pairs of numbers has a least common multiple ?
JulsSmile [24]

Answer:

2 and 24

Step-by-step explanation:

because I like to say bawk

5 0
2 years ago
Other questions:
  • Write the partner. 16-8=
    13·2 answers
  • A plastic bin contains red, yellow, and green key chains. Out of 350 key chains, 10% percent are yellow. Of the remaining key ch
    13·1 answer
  • A boat traveled 189 miles downstream and back. The downstream trip took 7 hours. The trip back took 21 hours. Find the speed of
    6·1 answer
  • Help ASAP
    5·1 answer
  • Plz answer all of it im putting 96
    8·1 answer
  • 1. IF the function f(x) = 2(x – 3)2 – 4 is shifted vertically three units up and horizontally
    13·1 answer
  • What is the quotient of 1/7 divided 2
    10·2 answers
  • Find 15 more then D<br> A.15+D<br> B.D+15
    7·2 answers
  • 2. The distance by road from Newport to London is 140 miles. Tom travels by coach from Newport to London. The coach leaves Newpo
    6·1 answer
  • Look at the image for any information and the question thank you
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!