Gracia worked 8.2, 6.9, 10.1, 8.6, and 8.9 hours this week. She worked about 8 hours longer than last week. About how many hours did she work last week?

The answer would be choice b

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)

Well it depends, i think b bc yeah