Answer: (A)
(B)
(C)
Step-by-step explanation:
- Null hypothesis
: It is a statement showing population parameters as per the objective of the study. It generally takes "≤,≥,=" signs. - Alternative hypothesis
: It is also a statement describing population parameters as per the objective of the study. It generally takes ">, <, ≠" signs.
(A) Objective: Scores in second-year calculus are scaled so the average each year is equivalent to a 75 or not.
(B) Objective: The mean time is 24 seconds or more for one particular maze.
(C) Objective: The average square footage of one-bedroom apartments in a new student-housing development is advertised to be 850 square feet or smaller.
The area of the sidewalk is 144.44 m².
The 2-m wide walk adds 4 m to the diameter, making it 21+4=25.
Since the radius is half the diameter, r = 25/2 = 12.5.
The area of the entire bed with walkway is 3.14(12.5)² = 490.625 m².
The diameter of the bed is 21, so the radius is 21/2 = 10.5.
The area of just the flower bed is 3.14(10.5)² = 346.185.
The difference between the two is 490.625-346.185 = 144.44 m². This is the area of the walkway.
Step-by-step explanation:
area of the trapezoid = area of the 2 triangles +
area of the rectangle
i) area of triangle on left:
a = ½ bh
a = ½ × 2 × 9
a = 9 in²
ii) area of triangle on right:
a = ½ bh
a = ½ × 2 × 9
a = 9 in²
iii) area of rectangle = length × width
a = l × w
a = 12 × 9
a = 108 in²
iv) area of trapezoid = 9 + 9 + 108
= 126 in²
hope this helps you!
-s.
Answer:
the difference in diamante r is it is 4 inches bigger than the 16 inch.
Step-by-step explanation:
Answer:
54.56
Step-by-step explanation:
The number after the point is not 5 or higher
