A function is increasing if it "points upwards".
Think that you have two inputs (think of them as being very close to each other). A function is increasing if
So, smaller input, smaller output.
So:
- In the first segment on the left, the function is decreasing: if you move with little steps rightwards, the output will get smaller and smaller (the function points to the right bottom)
- In the second segment, the line is constant (it's horizontal). This means that even if you consider a larger input, the output reimains the same
- In the third segment, the function is increasing: if you consider a larger input, the output will be larger as well: the function points to the top right.
- In the fourth segment, the function is decreasing again (look at the first bullet point)
So, the function is increasing in the third segment, which is delimited by
Answer:
a) t= 2hours and 10 minutes
b) t=4hours and 20 minutes
v1t1=v2t2
Hi there!
To find the surface area, we need to find the area of all of the faces. The triangle face = 4 x 6, and the rectangular faces = 2(5 x 12) + 1(6 x 12). All we are doing is simply finding the area of each face and adding it together. The area of the triangles = 24, and the area of the rectangles = 192. Then, add the two values to get 216cm^2.
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