Liters the rest are to small and kg is for solids
In both cases,
(as a consequence of the interesecting secant-tangent theorem)
So we have
10.
(omit the negative solution because that would make at least one of AB or AD have negative length)
11.
(again, omit the solutions that would give a negative length for either AB or AD)
450=50x this should be correct :)
1:50 mean u would multiply 30 by 50 which equals 1500
The answer is D 16a: 1,2,3,4,8,16 and 18ab:1,2,3,46,9,18 a,b