The sun casts a 70 foot shadow on a 30 foot tree. Find the angle of elevation to the nearest degree.

23°

Step-by-step explanation:

We apply Pythagorean theorem to determine the missing length, Hypotenuse:

This hypotenuse corresponds to the right triangle and the tree's height, corresponds to the angle of elevation:

-We apply the law of Sines;

Hence, the angle of elevation is 23°

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.