Mike's age is five more than three times his sister's age. Mike is seventeen years old.
2 answers:
Answer:
The correct option is B) .
Step-by-step explanation:
Consider the provided information.
Mike's age is five more than three times his sister's age. Mike is seventeen years old.
Let Mike's sister age is x.
Five more than three times his sister's age can be written as:
Mike is seventeen years old.
Hence, the required equation is .
Thus, the correct option is B) .
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Answer:
The correct option is b) 1.70
Step-by-step explanation:
Consider the provided information.
The weekly sulfur dioxide emissions follow a normal distribution with a mean of 1000 ppm (parts per million) and a standard deviation of 25.
Thus, μ=1000 and σ = 25
The CEO wants to know if the mean level of emissions is different from 1000.
Therefore the null and alternative hypothesis is:
and
The sample size is n = 50 and ppm.
Now calculate the test statistic by using the formula:
Substitute the respective values in the above formula.
Hence, the correct option is b) 1.70