Discussion
Mission segment fractions are \( 0.97, 0.985, 0.86, 0.99 \) and \( 0.995 \). The overall weight ratio is nearest to
Answer: C
Correct answer: 0.809
Segment fractions are ratios of weight at the end of a segment to weight at the start, so they multiply rather than add: \[ 0.97 \times 0.985 \times 0.86 \times 0.99 \times 0.995 = 0.809. \] Adding them would give a number greater than one, which is the usual error. The 0.86 is the cruise segment and dominates the product, as it should.
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