Asked by bandar
Sarah had 4 pieces of rope.each piece was twice the length of the previous piece. the first piece was 1 foot 3 inches long. How many feet of rope did Sarah have altogether.
first piece=1 foot 3 inches
second piece= 2x1 foot 3 inches
third piece= 2 foot 6 inches x2
fourth piece=4 foot 12 inches
all the rope= 9 feet 24 inches
first piece=1 foot 3 inches
second piece= 2x1 foot 3 inches
third piece= 2 foot 6 inches x2
fourth piece=4 foot 12 inches
all the rope= 9 feet 24 inches
Answers
Answered by
Steve
better check again. The pieces are
1'3"
2"6"
4'12"
8'24"
add them up. Or, using a geometric series, the total is 1.25(2^4-1) = 18.75
1'3"
2"6"
4'12"
8'24"
add them up. Or, using a geometric series, the total is 1.25(2^4-1) = 18.75
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