Answer:
21
Step-by-step explanation:
To find the area of a cylinder you mutliply radius by height.
r*h = 162
If we know the height is 7.7, substitute it for <em>h.</em>
r*7.7 = 162.
Or:
162 / 7.7
Which gives you 21.03, or 21.
Answer:
Give me a few minutes and ill put the answer in
Step-by-step explanation:
68,642 rounded to the nearest thousand is 69,000.
It's because 68,642 is closer to 69,000 than to 68,000.
I hope it will help you and give a clue for rounding numbers in the future ;)
Answer:
20, 37
Step-by-step explanation:
You can usually work these "sum and difference" problems in your head.
One of the numbers is half the sum of those given; the other is half their difference.
Here, the smaller number is (57 -17)/2 = 20; the larger is 20+17 = 37.
The two numbers are 20 and 37.
____
Let a and b represent the numbers, and let s and d represent their sum and difference. The two equations you can write are ...
a + b = s
a - b = d
Adding these two equations gives ...
(a +b) +(a -b) = (s) +(d)
2a = s+d
a = (s+d)/2 . . . . . . half the sum of the given numbers
Subtracting the second equation from the first gives ...
(a +b) -(a -b) = (s) -(d)
2b = s-d
b = (s-d)/2 . . . . . . half the difference of the given numbers
Answer: <span>rotation and dilation.
While rotation only rotates (obviously) the figure, dilation preserves the shape of the figure (that is, preserves the angles) but changes the distances: it makes the figure smaller.
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The other 2 sequences of transformations only change the position of the figure, but the angles and distances remain intact.