Answer:
7.5'
Step-by-step explanation:
Use trigonometry.
Draw it out.
the hypotenuse is 15.
You want to find the adjacent side.
Use cosine (the adjacent over hypotenuse)
cos60=A/15
15cos60=A
7.5=A
Answer:
7x12x2=168 I think but how did u do this
Yes not sure though but I want to say yes
Answer:
There is not enough evidence to support the claim that the true average penetration is at most 50 mils.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 50
Sample mean, = 52.8
Sample size, n = 45
Alpha, α = 0.05
Sample standard deviation, s = 4.5
First, we design the null and the alternate hypothesis
We use one-tailed t test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
The calculated test statistic is greater than the critical value, we fail to accept the null hypothesis and reject it. We accept the alternate hypothesis.
Conclusion:
There is not enough evidence to support the claim that the true average penetration is at most 50 mils.