-18 because 2 1/4 as an improper fraction is 9/4 then it -8/1 then multiply which is -72/4 and simplified is -18.
Answer:
Area of the figure= 
Step-by-step explanation:
Area of the figure=Area of the middle rectangle+ Area the the two triangles
Area of the rectangle=Length*Width


Area of the triangle with the height of 2 feet and base= 3 feet
Area= 
=
Area of the triangle with the Height=3 feet and Base= 3 feet
Area= 

Total Area of the figure
Answer:
-1/4
Step-by-step explanation:
Perpendicular lines have slopes that multiply to -1
m * 4 = -1
Divide by 4
m = -1/4
The slope of a line that is perpendicular to a line that has a slope of 4 is -1/4
Answer:
The correct answer is option 'a' : 120 is more than 2.5 standard deviations above the expected value.
Step-by-step explanation:
For an exponential distribution we have
The expected value μ = 80
No of trails n = 200
Thus we have

The deviation is related to expected value and probability as

Thus the values between the given deviation is

Now since 120 successes are out of the range of [62.75,97.25] thus 120 is more than the expected value.