Create a linear system to model this situation:
Cheri operates a grass-cutting business. She
...
Mathematics, 11.12.2020 02:40 malaysiasc93
Create a linear system to model this situation:
Cheri operates a grass-cutting business. She
charges $20 for a small lawn and $30 for a large
lawn. One weekend, Cheri made $290 by cutting
12 lawns.
A. s + L = 290
20s + 30L = 12
B. s + L = 290
30s + 20L = 12
C. s + L = 12
20s + 30L = 290
D. s + L = 12
30s + 20L = 290
Answers: 2
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Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables
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