The answer is: [C]: " -16√10 " .
________________________________________________________
Note:
________________________________________________________
" -4√160" = -4 * √160 " ;
________________________________________________________
√160 = √16 *√10 = 4√10 ;
-4 * * 4√10 = -16√10 ;
which is: Answer choice: [C]: " -16√10 " .
_________________________________________________________
The numbers are 90 and 60. this is because with a ratio 3:2 and multiplying each # in our ratio by 30 gets us the numbers 90:60......
and adding 90 + 60 will get us 150
12ft by 24ft. 1.5 X 16 is 24 and .75 X 16 is 12