A laser range finder is able to compute a distance up to 3 km with an accuracy of 99.5%. What possible error is there in a reported measurement of 2500 meters?
A less than 5 meters
B between 5 an 10 meters
C between 10 and 15 meters
D over 20 meters
2006-12-04 05:41:02 · 5 answers · asked by star wars freak 2 in Science & Mathematics ➔ Mathematics
3km=3000 meters
3000*.005(the error rate)=15
15/3000 compared to X/2500
15*2500=37500
3000*X=3000X
37500=3000X
37500/3000=3000X/3000
12.5=X
So C is your answer.
2006-12-04 06:09:46 · answer #1 · answered by gregory_dittman 7 · 0⤊ 0⤋
the error in length measured is 12.5m.
thus the correct answer is c (between 10 and 15 m).
2006-12-04 06:03:17 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Possible error = relative error * reported measurement
Possible error = 0.5% * 2500 m
Possible error = 12.5 m
Therefore, C is the correct answer
2006-12-04 05:44:11 · answer #3 · answered by sep_n 3 · 2⤊ 0⤋
2500m*.005=12.5m
C. between 10 & 15 m
2006-12-04 06:15:20 · answer #4 · answered by yupchagee 7 · 0⤊ 0⤋
the answer is c
2006-12-04 05:53:22 · answer #5 · answered by thrust_reversal 1 · 0⤊ 0⤋