Answer:
D
Step-by-step explanation:
Your equation would be 2x^2-3=y
This means that it should touch the y axis at -3, but since there is an exponent, it should be a parabola, not a straight line. Hence the answer is D
A=pi *r^2=pi *(D/2)^2=3,14*D^2/4
⇒D^2=4*A/3,14=4*50/3,14=200/3,14≈63,7
D≈V63,7
Since this triangle is a right triangle, and the lengths of the sides are included we can use trigonometry to determine the measure of angle U.
In case you're unsure of the trigonometric ratios remember: SOH CAH TOA
Sin. = opposite/hypotenuse, Cos. = adjacent/hypotenuse, Tan. = opposite/adjacent
Since all the side lengths are given, your choice of ratio will not affect the final answer. I will be using Tan. = opposite/adjacent.
Tan. of angle U = 77/36 = <span>2.13888888889
Now you can refer to a trigonometric table to see which angle degree is most similar to the decimal above.
In this case the angle is around 65 degrees.</span>
