Answer:
252
Step-by-step explanation:
9 x 28 = (9 x 20) + (9 x 8)
9 x 20 = 180
9 x 8 = 72
180 + 72 = 252
9 x 28 = 252
(hope this helps can I pls have brainlist (crown) ☺️)
Answer:
84
Step-by-step explanation:
first calculate the rectangle (6* 10 = 60) and then add that to the area of the triangles. 1/2(4) * 6= 2 * 6 = 12, and since there are two triangles: 12* 2 = 24, add that to the area of the rectangle and you get 84.
Find the median of the given data. If the mean is 4.5...
5, 7, 7, 8,x,5,4,3 = x, 3, 4, 5, 5, 7, 7, 8
The median is 5. For the second part... The question is incomplete... “If the mean is 4.5...” Also, I have no idea if x should have been added or not. Even if it was, it doesn’t change the answer.
Answer:
-4 is the slope (m)
Step-by-step explanation:
Answer:
The claim is not true
Step-by-step explanation:
We are given that A local retailer claims that the mean waiting time is less than 8 minutes.
A random sample of 20 waiting times has a mean of 6.3 minutes with a standard deviation of 2.1 minutes.
s = 2.1
n = 20
Since n <30 and population standard deviation is unknown
So,we will use t test
So,
t=-3.62
α = 0.01
Degree of freedom = df=n-1=20-1=19
t calculated < t critical
So, we failed to reject null hypothesis
Hence the claim is not true
