How do you write 15.9 in scientific notation?
2 answers:
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Answer:
Part 11) see the explanation
Part 12) The graph in the attached figure
Step-by-step explanation:
Part 11)
Let
x ----> the number of tickets is section A (cost $50 each)
y ----> the number of tickets is section B (cost $40 each)
we know that
At most means "less than or equal to"
----> inequality A
----> inequality B
Using a graphing tool
The solution is the shaded area
see the attached figure N 1
Three possible combinations are the points
(0,10),(5,5),(9,0)
That means
(0,10) ----> They buy 0 seats in section A and 10 seats in section B
(5,5) ----> They buy 5 seats in section A and 5 seats in section B
(9,0) ----> They buy 9 seats in section A and 0 seats in section B
Part 12)
Let
x ----> the number of hours Kendra works as a babysitter
y----> the number of hours Kendra works providing technical support
we know that
----> inequality A
At least means "greater than or equal to"
----> inequality B
using a graphing tool
The solution is the triangular shaded area
The graph in the attached figure N 2
Answer:
B. Larger sample size and lower confidence level
Step-by-step explanation:
The margin of error of a confidence interval is given by the following formula:
In which is the standard deviation of the population and n is the size of the sample.
z is related to the confidence level. The higher the confidence level, the higher the value of Z.
So, the margin of error is direct proportion to the confidence level and inverse proportional to the sample size.
We want to decrease the margin of error.
So the correct answer is:
B. Larger sample size and lower confidence level