A sea lion jumped out of the water to a height of 3 feet above sea level. The number line shows the location of the sea lion at
the top of its jump. From this location, the sea lion dove down 9 feet. Describe how to use the number line to find the new location of the sea lion.
A. On the number line, move 9 units to the left. End at -6. The sea lion was 6 feet below sea level.
B. On the number line, move 9 units to the right. End at 12. The sea lion was 12 feet above sea level.
C. On the number line, move 9 units to the right. End at 6. The sea lion was 6 feet above sea level.
D. O3n the number line, move 9 units to the left. End at -12. The sea lion was 12 feet below sea level.
A. On the number line, move 9 units to the left. End at -6. The sea lion was 6 feet below sea level.
B. On the number line, move 9 units to the right. End at 12. The sea lion was 12 feet above sea level.
C. On the number line, move 9 units to the right. End at 6. The sea lion was 6 feet above sea level.
D. O3n the number line, move 9 units to the left. End at -12. The sea lion was 12 feet below sea level.
1 answer:
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Answer:
It can be concluded that at 5% significance level that there is no difference in the amount paid by chain A and chain B for the job under consideration
Step by Step Solution:
The given data are;
Chain A 4.25, 4.75, 3.80, 4.50, 3.90, 5.00, 4.00, 3.80
Chain B 4.60, 4.65, 3.85, 4.00, 4.80, 4.00, 4.50, 3.65
Using the functions of Microsoft Excel, we get;
The mean hourly rate for fast-food Chain A, = 4.25
The standard deviation hourly rate for fast-food Chain A, s₁ = 0.457478
The mean hourly rate for fast-food Chain B, = 4.25625
The standard deviation hourly rate for fast-food Chain B, s₂ = 0.429649
The significance level, α = 5%
The null hypothesis, H₀: =
The alternative hypothesis, Hₐ: ≠
The pooled variance, , is given as follows;
Therefore, we have;
The test statistic is given as follows;
Therefore, we have;
The degrees of freedom, df = n₁ + n₂ - 2 = 8 + 8 - 2 = 14
At 5% significance level, the critical t = 2.145
Therefore, given that the absolute value of the test statistic is less than the critical 't', we fail to reject the null hypothesis and it can be concluded that at 5% significance level that chain A pays the same as chain B for the job under consideration
Using an exponential function, it is found that the number 131.5 represents the initial value of the plane, in thousands of dollars.
<h3>Exponential function:</h3>A decaying exponential function is modeled by:
In which:
- A(0) is the initial value.
- r is the decay rate, as a decimal.
In this problem, the function for the value of the airplane after t years is given by:
Hence A(0) = 131.5, which means that the number 131.5 represents the initial value of the plane, in thousands of dollars.
To learn more about exponential functions, you can take a look at brainly.com/question/8935549