Answer:
132 cm squared
Step-by-step explanation:
Find the area of the rectangle on the top first.
Finding the area of a rectangle:
The formula to find the area of a rectangle is to multiply the length by the width. So for your rectangle you would do
7 x 4 = 28cm squared. Keep this is mind and we will move on the the next problem.
The figure under the rectangle is a trapezoid.
To find the area of a trapezoid:
Step 1)
Average the bases.
The dotted line is 7 cm. This is a base.
The line on the very bottom is 19 cm. This is your 2nd base. Find the average of these bases.
(7 + 19) / 2
= 26/2
=13
Step 2)
Multiply this by the height. The height of the trapezoid is 8 cm.
Multiply:
13 x 8
This would get you 104. This is the area of the trapezoid.
Add 104 to the area of the rectangle, 28, to get 132.
The area of the whole figure, therefore, is 132cm squared.
I hope this helps!
Answer:
<u>0.013</u>
Step-by-step explanation:
20 hundredths = 0.2
65 thousandths = 0.065
0.2 × 0.065 = 0.013
Most likely she incorrectly moved the decimal point in her calculation. The percent of a group cannot be more than 100.
Step-by-step explanation:
such a rectangular prism is in that sense like a cube (or die) : it has 6 sides or surface areas. top, down, front, back, left, right.
to get the total surface area we need to calculate each individual side area and sum all 6 of them up.
since it is a rectangular shape, there are 3 pairs of equal side areas, so, we really need to calculate only 3 different ones :
front and back : each is
10×9 = 90 in², both together are 180 in²
left and right : each is
8×9 = 72 in², both together are 144 in²
top and bottom : each is
10×8 = 80 in², both together are 160 in²
the total surface area of the prism is
180 + 144 + 160 = 484 in²
Answer:
40cm
Step-by-step explanation:
Given data
Length= 15cm
Width=30cm
Volume= 18liters
1000cm^3= 18liters
18000cm^3= 18liters
We know that volume
Volume= L*W*h
18000= 15*30*h
18000=450h
h= 18000/450
h= 40cm
Hence the height is 40cm