Answer:
18 hours
Step-by-step explanation:
15 centimeters -> 6 hours
Multiply by 3
45 centimeters -> 18 hours
The formula for the surface area of a cylinder is:

Plug in what we know, use 3.14 to approximate for pi(radius is half the diameter, 30/2 = 15):

Simplify:

Subtract 1413 to both sides:

Divide 94.2 to both sides:

So the height is approximately 45 millimeters.
Answer:

Step-by-step explanation:
<u>Area Of Compound Regions</u>
When a surface has no regular shape, it can be usually divided into smaller regular parts and add their areas. The surface shown in the figure can be split into 3 smaller rectangles (please refer to the image below).
The area of the yellow part is

The pink region has a height h=4 yd - 3 yd = 1 yd
The area of the pink region is

The total area is

Answer:
5 hours.
Step-by-step explanation:
- If the train travels at a speed of 80 kilometers per hour, and a kilometer is equivalent to 1000 meters, then the train travels at a speed of
- Then, to reach the 400,000 meters, it will take
, 5 hours.
Answer: See explanation
Step-by-step explanation:
The difference in the length of the polar bear will be:
= 2 7/9 - 1 5/6
The lowest common multiple of 9 and 6 is 18.
= 2 7/9 - 1 5/6
= 2 14/18 - 1 15/18
= 17/18
She is incorrect as she subtracted the denominator from the numerators and didn't find their lowest common multiple. She got the answer this way:
= 2 7/9 - 1 5/6
= (2 - 1) (7-5)/(9-6)
= 1 2/3