Mathematics, 30.03.2021 19:10 rustalex6045
Pls help asap!! ill give brainliest:
The height in meters, S, of a rocket t seconds after being launched with an upward velocity of 80 meters per second may be approximated by this equation:
S = 80t - 5t^2
How many seconds after launch is the rocket first 140 meters above the ground?
A. 14
B. 5.3
C. 8
D. 2
Answers: 2
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Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?
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Pls help asap!! ill give brainliest:
The height in meters, S, of a rocket t seconds after being lau...
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