21. solve for ‘x.
11
13
21
a. 5
b. 11
c. 12

c. 12

Step-by-step explanation:

Deduct 11 from 21 to get 10, then split it in half, to get 5 as your two bases for the right triangles. Now, according to the Pythagorean Theorem, a² + b² = c², in this case, since the hypotenuse, c, is already defined, use Subtraction to find the other leg:

25 + b² = 169

-25 - 25

______________

√b² = √144

b = 12

When we are talking about lengths, we want the NON-NEGATIVE root.

I am joyous to assist you anytime.

step-by-step explanation:

(s)he  is right it would be 5.5% because it is smaller than 15.5% or anything smaller than 15.5% in general

it is probably the graph on the bottom right.