Answer:
Step-by-step explanation:
This is a question on hypothesis testing.
Population mean based on 30 year average for July was 90 with
a std deviation of 2.1
Sample of 5 shows average 93.5
To check whether sample average = population average
H0: x bar =90
Ha: x bar not equal 90(Two tailed test)
Test statistic = 
=3.73
Since this lies outside the range (-1.96, 1.96) we reject null hypothesis
Hence we cannot say sample mean equals 90
Answer:
5a plus 5 minus 3a is equal 13
Step-by-step explanation:
Answer:
78
Step-by-step explanation:
do the equation backwards. 157 minus 1 equals 156, and 156 divided by 2 equals <u>78</u>. Hope this helps. pls mark brainliest
Answer:
554
Step-by-step explanation:
554 trust meh dude
Answer:
<h2>MP ≈ 2.98 cm</h2>
Step-by-step explanation:
Use sine:

We have:

Substitute:

<em>cross multiply</em>
<em>divide both sides by 1,000</em>
