Can you please help me , I need this grade !!

2) is 5 and 6

a) is 2.2 and 2.3

b)  I know how to place because i know the square roots that is between which is and so the square root of 5 is between  2 and 3 and then you multiply the numbers between 2 and 3 which i tried to get the closest to  get the closest to 5. In which is between 2.2 and 2.3.

Step-by-step explanation:

My explanation is bad but you could probably word it better.

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.