Find the sum and product of each of these pairs of num- bers. express your answers as a base 3 expansion. a.(112) 3 , (210) 3 b.(2112) 3 , (12021) 3 c.(20001) 3 , (1111) 3 d.(120021) 3 , (2002) 3

Adding in base 3 is very much like adding in base 10, but instead of carrying digits when their sum exceeds 9, we have to watch for when the sum exceeds 2:

.   112
+  210
- - - - -
.   322 -> 1022

.   12021
+    2122
- - - - - - -
.   14143 -> 14150 -> 14220 -> 21220

.   20001
+    1111
- - - - - - -
.   21112

.   120021
+      2002
- - - - - - - -
.    122023 -> 122030 -> 122100

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.