Answer:
Option C
Step-by-step explanation:
Given that for a random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard deviation of 320 square feet.
X, the sizes of houses is Normal
Hence sample mean will be normal with
Mean = 1880
and std dev = 
For 90% confidence interval critical value for t with degree of freedom 19 is
1.328
Confidence interval upper bound
= mean + margin of error
= 
Option C is right
Answer:
3.08 i turned it to a decimal
Step-by-step explanation:
2 3/4= 2.75
1/3=.33 and add them to get 3.08
in fraction form it is 3 1/12
Answer:
The circumference of given circle = 502.4 inches
Step-by-step explanation:
Formula:
Circumference of circle = 2πr
Where r - Radius of circle
and π is a constant value
<u>To find the Circumference of circle</u>
Here
radius r = 80 inches and
π = 3.14
Circumference = 2πr = 2 * 3.14 * 80 = 502.4 inches
Therefore Circumference of given circle = 502.4 inches
Answer:
x=44
Step-by-step explanation:
since it's a 90 degree triangle
2x+2=90
2x=88
x=44
