PRINTED GUIDE COMPANION · MISSION 7
Printed-Problem Help
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Search all 83 registered V9 questions by number, phrase, formula, or topic and open the teacher-guide-verified solution.
Search verified question helpVIDEO HELP · TG-V9-052
Measure a Star Brightness Drop (TG-V9-052)
Calculate the 1% brightness decrease from 10,000 to 9,900 units, then check the 99% remaining brightness.
Watch the worked exampleVIDEO HELP · TG-V9-053
Calculate Experimental Reliability (TG-V9-053)
Use 45 of 50 usable observations to estimate 90% reliability, then check the complementary 10%.
Watch the worked exampleVIDEO HELP · TG-V9-054
Probability That Both Instruments Work (TG-V9-054)
Multiply independent probabilities to find an 81% chance that both instruments work, then check the 100-cell model.
Watch the worked exampleVIDEO HELP · TG-V9-055
Use a Tangent Distance Formula (TG-V9-055)
Use degree mode and the supplied tangent formula to find about 11.34 units, then reverse-check the baseline.
Watch the worked exampleVIDEO HELP · TG-V9-056
Predict the Next Brightness Dip (TG-V9-056)
Find the six-day spacing between brightness dips and predict the next dip on day 30 if the pattern continues.
Watch the worked exampleVIDEO HELP · TG-V9-057
Count Events in At Least One Group (TG-V9-057)
Add the two event totals and subtract the overlap once to count 50 events in at least one group.
Watch the worked exampleVIDEO HELP · TG-V9-058
Find a Relative Frequency (TG-V9-058)
Use 52 out of 80 sampled sunspots to find a relative frequency of 65%, then check the remaining 35%.
Watch the worked exampleVIDEO HELP · TG-V9-059
Compare Estimates from Two Samples (TG-V9-059)
Compare 75% from 8 observations with 70% from 90, and explain why sample size and sampling quality matter.
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