Step: 1

Scale factor = (length after projection) / (actual length)

Step: 2

= 3 0.9 = 3.3

[Substitute the values and simplify.]

Step: 3

The scale factor of the projector is 3.3.

Correct Answer is : 3.3

Step: 1

Scale factor = (height of the enlarged logo) / (actual height of the logo)

= 15 12 = 5 4 = 1.25

[Simplify.]

Step: 2

The scale factor is 1.25.

Correct Answer is : 1.25

Step: 1

Let, n be the actual size of the dinosaur's tail.

Step: 2

[The dimensions of the actual dinosaur will be in proportion to the dimensions of the model.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

So, the actual size of the dinosaur's tail is 120 ft.

Correct Answer is : 120 ft

Step: 1

Let m be the actual height of the cup.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

The actual height of the cup is 2 in.

Correct Answer is : 2 in

Step: 1

Let p be the actual height of the penguin.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

The actual height of the penguin is 60 cm.

Correct Answer is : 60 cm

Step: 1

Let k be the actual length of the lake.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Multiply.]

Step: 5

The actual length of the lake is 100 miles.

Correct Answer is : 100 miles

Step: 1

Let b be the length of the bridge.

Step: 2

[Write the proportion using the scale.]

Step: 3

[Write the cross products.]

Step: 4

[Multiply.]

Step: 5

The length of the bridge is 9 miles.

Correct Answer is : 9 miles

Step: 1

Let n be the actual height of the plant.

Step: 2

[Write the proportion using the scale.]

Step: 3

[Write the cross products.]

Step: 4

[Multiply.]

Step: 5

The actual height of the plant is 6.6 feet.

Correct Answer is : 6.6 feet

Step: 1

Let h be the actual height of the couch.

Step: 2

1/[1 2 ] = 4/h

[Write the proportion using the scale.]

Step: 3

[Write the cross products.]

Step: 4

[Multiply.]

Step: 5

The actual height of the couch is 2 feet.

Correct Answer is : 2 feet

Step: 1

Let n be the actual length of the bat.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

The actual length of the bat is 26 inches.

Correct Answer is : 26 inches

Step: 1

Let n be the actual area of the land submerged in water.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

The actual area of the land submerged in water is 144 square miles.

Correct Answer is : 144 square miles

Step: 1

Let n be the actual height of the tree.

Step: 2

[Write the proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Simplify.]

Step: 5

The actual height of the tree is 16 meters.

Correct Answer is : 16 meters

Step: 1

The scale is the ratio of size of the statue in the blue print to the size of the original statue.

Step: 2

[Write the ratio.]

Step: 3

= 15÷15 105÷15 = 1 7

[Divide both numerator and denominator by the GCF 15.]

Step: 4

The scale used by the sculptor is 1 in. : 7 ft.

Correct Answer is : 1 in. : 7 ft

Step: 1

Let n be the actual height of the tree.

Step: 2

[Write the scale and its related Proportion.]

Step: 3

[Write the cross products.]

Step: 4

[Multiply.]

Step: 5

So, the actual height of the tree is 18 meters.

Correct Answer is : 18 meters

Step: 1

The actual combined length of hillock and tower = 160 + 64 = 224 m

Step: 2

[(length of the model)/(actual length)]

Step: 3

= (7÷7) (224÷7) = 1 32

[Divide both numerator and denominator by the GCF 7.]

Step: 4

Jason used a scale of 1 cm : 32 m.

Correct Answer is : 1 cm : 32 m

- Complementary, Supplementary, Vertical and adjacent Angles-Gr 7-Solved Examples
- Finding Missing Angles in Polygons-Gr 7-Solved Examples
- Application Problems involving Scale Drawings-Gr 7-Solved Examples
- Solving Problems on Area of a Circles-Gr 7-Solved Examples
- Circumference of Circles-Gr 7-Solved Examples
- Perimeter and Area of Composite Figures-Gr 7-Solved Examples

- Indirect Measurement