Answer:
the commas must go between Witt and not, and Thomas and took.
Step-by-step explanation:
East German figure skater Katarina Witt, not American Debi Thomas, took home the gold medal at the 1988 Winter Olympics
Answer:
We conclude that the steel has an average hardness index of at least 64.
Step-by-step explanation:
We are given the following in the question:
Population mean, μ = 64
Sample mean, = 62
Sample size, n = 50
Alpha, α = 0.051
Sample standard deviation, s = 8
First, we design the null and the alternate hypothesis
We use one-tailed(left) z test to perform this hypothesis.
Formula:
Putting all the values, we have
Now,
Since,
We fail to reject the null hypothesis and accept the null hypothesis. Thus, we conclude that the steel has an average hardness index of at least 64.
Step-by-step explanation:
In all cases just divide 360° by the number of sides
Thus,for a. 360°/12=30°