Answer:
for the first one x=4 and y=2
check the picture below.
namely, which of those intervals has the steepest slope, recall slope = average rate of change.
now, from the picture, notice, those two there are the steepest, the other three are leaning too much to the "ground".
so, from those two, which is the steepest anyway? let's check their slope.
15.7 I believe.. I’m not sure but I multiplied pie and 5
I think B to, it’s the closest
Note that this is a right triangle, and that the length of the hypotenuse (17) is given, as is one of the acute angles (30 degrees). We need to determine the length of the "adjacent side," that is, the side of the triangle adjacent to the 30 degree angle. Which of the 6 trig functions relates the 30 degree angle, the length of the hypo. and the length of the adj. side?
cos theta = (adjacent side) / (hypotenuse)
Then cos 30 degrees = x / 17 units, or (17 units) cos (30 degrees) = x
Use your calculator to find the value of cos 30. Multiply your result by (17 units).
The result is your answer (the length of the horiz. side, DF).