The answer is D, tony would always be behind Robert.
With all the stuff added together, the sum is 2.03 kg
3 x 12 would equal 36, +1 would make it 37. Since there is no space in between 2 and the (, you multiply it. 37 x 3 = 111
So, Jeff should order 111 books
A) Angle A has to be congruent to Angle D