1. C base is 20 height is 9.6
2. D 96; A = b*h*1/2
3. i can't view the pic for 3, sorry
4. C, 7.82
5. B, 17.94
Answer:
(5√12)/12
Step-by-step explanation:
In general, 1/√a can be rationalized as (√a)/a. That is the denominator can be multiplied by the square root of the same number to rationalize it. The numerator needs to be multiplied by the same square root.

12/15×6/7 = 24/35 9/8×4/12 = 3/8 13/15×6/7 = 26/35
U go find it and come back to me