Rama is stringing beads whose lengths are each 0.19 inches. how can rounding be used to estimate the length of a row of
9 beads?

1.since the beads are about 0.20 inches, the length of a row of 9 beads will be approximately 9 + 0.20 = 9.20 inches.

2.since the beads are about 0.10 inches, the length of a row of 9 beads will be approximately 9 +0.10 = 9.10 inches

3.since the beads are about 0.10 inches, the length of a row of 9 beads will be approximately 9 x 0.10 = 0.80 inches.

4.since the beads are about 0.20 inches, the length of a row of 9 beads will be approximately 9 x 0.20 = 1.80 inches.