Witch pair of angles has congruent valuse for the sin x degrees and the cos y degrees. a) 40 degrees; 140 degrees b)40 deg; 80 deg; c)40 deg; 50 deg; d)40 deg; 40 deg;

The average density of the rod is 1.11 kg/m

Step-by-step explanation:

Linear density is given by the expression 10/(sqrt(x 1)) kg/m

x is said to be measured in meters from one end of the rod. Therefore x represents the length of the rod = 8 m

Substitute the value of x into the expression of linear density to determine the average density of the rod

Average density = 10/(sqrt(81)) = 10/9 = 1.11 kg/m