In the diagram below, BC is an altitude of AABD. To the nearest whole unit, what is the length of CD?
B
30
A
O
16ο
Α. 52
Β. 58
C, 44
D. 56

56

Step-by-step explanation:

Let CD = x  and BD = y

In triangle ABC   by the Pythagorean theorem.

So

Now in triangle ABD

by the Pythagorean theorem

and in triangle ACD    by the Pythagorean theorem

Now

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

-14 is the answer

hope this : ))