Use the geometric mean for right triangles here. Like this

. Cross multiply to get

, and

. That simplifies down to

. Pull out the 9 as a perfect square of 3 and you're left with

, first choice above.
An equivliant to 8x6 is 6x8
Answer:
1 16/25
Step-by-step explanation:
1 whole and remaining decimal 0.64
0.64 is 64/100 as a fraction which simplifies to 16/25
So as a whole number its 1 + 16/25 which is 1 16/25
Hope this helps.
The answer would be 2<span>√<span>6 and in decimal form </span></span><span>4.898979, I hope this helps!</span>