Answer:
38.9
Step-by-step explanation:
The width is 3m because 3*7 is 21m^2. Also they said the length is 4 more than the width (3+4=7)
Answer:
The area is 105.5ft^2
Step-by-step explanation:
Required
The area of the composite figure
The figure can be divided to 2 shapes
(1) Rectangle: Length = 6ft and Width = 8ft
(2) Trapezoid: Height = 5ft (i.e. 8 - 3), Parallel sides = 9ft and 14ft (i.e. 20 - 6)
The area of the rectangle is:

The area of the trapezoid is:




So, the area of the garden is:


13 students only have tablets and 9 of them have non of the two so the answer is 22