Mathematics, 13.12.2021 03:30 thickness7699
"The captain of a rafting boat takes his crew down river for 6 hours, covering a total of 56 miles. When he
realizes he left one of his passengers behind, he is forced to paddle back upriver for 8 miles. The trip back up
took him 3 hours."
A student used the following system of equations to model the situation given above. Which of the statements
is true about the system of equations the student used?
b = the speed of the boat
r = the speed of the current
8(6-r) = 3
16(6+r) = 56
A. The system of equations the student used is correct.
B. The top equation in the system is incorrect.
C. The bottom equation in the system is incorrect.
D. Both equations in the system are incorrect.
Answers: 3
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Mathematics, 22.06.2019 02:30, GreenHerbz206
Researchers are conducting experiments to determine the role of alcohol in the development of depression. after the study is complete, they determine that the relative risk of developing depression is 1.55 with a 95 % ci of 1.2 -1.9. each group is then divided into nonsmokers and smokers. the relative risk for the nonsmokers is 1.12 with a 95% ci of 0.87-1.37. the relative risk for the smokers is 1.7 with a 95 % cl of 1.5-1.9. what type of bias may affect this study? a. procedure bias b. recall bias c. selection bias d. confounding e. lead-time bias
Answers: 2
"The captain of a rafting boat takes his crew down river for 6 hours, covering a total of 56 miles....
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