According to a study published by the National Institute of Health, during intercourse condom breakage rates fall between 0.4% a
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The answer is: 5,614 square inches.
The explanation is shown below:
1. The gift on the bottom is a rectangular prism. To calculate its surface area, you must apply the following formula:
Where is the length (20 inches),
is the width (42 inches) and
is the heigth (16 inches).
2. Substitute values:
3. The surface area of the other gifts can be calculated with the formula for calculate the surface area of a cube:
Where is the side.
4. The surface area of the bigger cube is:
5. The surface area of the smaller cube is:
6. The total surface area (the combined surface area of the three gifts) is:
ANSWER:
1) 25.70 cm 2) 30.84 cm 3) 10.71 km 4) 1.07 km 5) 6.71 cm 6) 10.07 mm
EXPLANATION:
<em>1. Know that the circumference formula for a full circle is:</em>
The value of pi () = 3.14
The radius () will be given in the diagrams.
<em>2. Now we can figure out the perimeters. </em>
<u>Shape One: Semi-circle</u>
C = 2 x 3.14 x 5
C = 31.4 cm
Divide the circumference by 2 because it is a semi-circle. Then add 10 cm to this (because the flat side is 10 cm).
P =
P = 25.7 cm ≈ 25.70 cm
<u>Shape Two: Semi-circle</u>
C = 2 x 3.14 x 6 (the picture shows the diameter so we need to half that to get the radius)
C = 37.68 cm
Divide the circumference by 2 because it is a semi-circle. Then add 12 cm to this (because the flat side is 12 cm).
P =
P = 30.84 cm
<u>Shape Three: Quadrant</u>
C = 2 x 3.14 x 3
C = 18.84 km
Divide the circumference by 4 because it is a quadrant. Then add 6 km to this (because the two flat sides are 3 km each and so it is 6 km total).
P =
P = 10.71 km
<u>Shape Four: Quadrant</u>
C = 2 x 3.14 x 0.3
C = 1.884 km
Divide the circumference by 4 because it is a quadrant. Then add 0.6 to this (because the two flat sides are 0.3 km each and so it is 0.6 km total).
P =
P = 1.071 km ≈ 1.07 km
<u>Shape Five</u>
C = 2 x 3.14 x 1
C = 6.28 cm
For this shape, we need to subtract the circumference of the missing sector from the circumference of the full circle to obtain the circumference for this shape. So, the circumference for the shape would be:
C =
C = 6.28 - 1.57
C = 4.71 cm
Then add the flat sides (1 cm + 1 cm = 2 cm) to this circumference to get the perimeter.
P = 4.71 + 2
P = 6.71 cm
<u>Shape Six</u>
C = 2 x 3.14 x 1.5 (Divide the 3 mm diameter by 2 to get the radius)
C = 9.42 cm
Do the same thing you did for Shape 5.
C =
C = 7.065 mm
Then add the flat sides (1.5 + 1.5 = 3) to this circumference.
P = 7.065 + 3
P = 10.065 mm ≈ 10.07 mm