Answer:
<em>a.</em><em> 2 lb 11 oz, </em><em>b.</em><em> 7 T 1,992 lb 12 oz , </em><em>c.</em><em> 38 lb 14 oz</em>
Step-by-step explanation:
The first thing we need to understand is the conversions.
<em>1 T = 2,000 lb</em>
<em>1 lb = 16 oz</em>
Knowing this, there are many ways to find out the answer, please see below the one I used; I <em>converted all measure units to oz</em>, <em>subtracted the amounts</em>, and finally <em>converted the units back to their original ones</em>.
a. 5 lb or (16 oz*5) - (2 lb or (16 oz*2) + 5 oz) = 80 oz - 37 oz = 43 oz = <em>2 lb 11 oz</em>
b. (17 T or (2,000 lb*17) + 13 lb + 3 oz) - (9 T or (2,000 lb*9) + 20 lb + 9 oz) = (34,013 lb or (16 oz *34,013) + 3 oz) - (18,020 lb or (16 oz *18,020) + 9 oz) = 544,213 oz - 288,329 oz = 255,884 oz = <em>7 T 1992 lb 12 oz</em>
c. (68 lb or (16 oz*68) + 13 oz) - (30 lb or (16 oz*30)+15) = 1,117 oz - 495 oz = 622 oz = <em>38 lb 14 oz</em>
