There is no picture, but here are the directions to finding the surface area.
1. Find the area of the square(A = bh) and remember that the base and the height will be the same on a square).
2. Find the area of one of the triangular faces (A = 1/2bh), where the base would also be the length of the side of the square and the height the lateral height of the triangular face).
3. Multiply your answer from 2 by 4 because there are 4 of these.
4. Add you answers for #3 and #1 to get the total surface area.
423.52 m should be the right one
First The rectangle part with the length is 105m, so you add 105 with 105 that make 210.
For the semicircle part,
we need to find the circumference of the circle
C = 2*pi*r ==> semi Circle circumference = 1/2(2*pi*r) = pi*r
68 is diameter ==> radius should be 34, and the Circumference of 1 semicircle should be 34*pi. We have 2 semicircles, so 2 have 68*pi
In the end Total perimeter = 210 + 68*pi = 423.52
To put it another way, that ratio exists, no matter what distance units you use to express lengths, such as the radius of the Earth, but using different units will result in a different numerical part.
<span>You can't, for instance, say the the radius of the Earth is 3960, and leave it at that. </span>
<span>If someone comes along who's measuring everything in km, he'll tell you that it's 6373. </span>
<span>Or if he's using meters, he'll say it's 6,373,000. </span>
<span>Or in yards, 6,969,600. </span>
<span>So r = 3960 mi </span>
<span>And as others have said, the area, A, and volume, V, of a sphere, in terms of its radius, are </span>
<span>A = 4πr² </span>
<span>V = 4πr³/3 </span>
<span>so that the area to volume ratio is </span>
<span>A/V = 3/r </span>
<span>So the answer is </span>
<span>3/(3960 mi) = (1/1320) /mi. </span>
Answer:
0.7 and 0.2 maybe
Step-by-step explanation:
7/10 = 0.7
2/10 = 0.2
If a number is positive, Leila's theory that 75% of a number will always be greater than 50% of another number is <em>true</em>;<em> </em>however, if both numbers are negative, or if the number of which she finds 50% is much greater than the number of which she finds 75%, Leila's theory could be incorrect.
This inequality shows that Leila is correct:
(which simplifies to
)
This inequality shows that Leila is incorrect:
(which simplifies to
)
Hope this helps!