Answer: 65a) 16, 24, 12.8 inches. 66) 0.6 cm
Step-by-step explanation:
65a)
For each of these, we need to find the proportion of the scale.
When the width is enlarged from 5 inches to 10 inches, it is being doubled (10/5 = 2). Thus the length (8 inches) is also doubled and becomes 16 inches.
Similarly, when the width is enlarged from 5 inches to 15 inches, it is being tripled (15/5 = 3). Thus the length (8 inches) is also tripled and becomes 24 inches.
Lastly, when the width is enlarged from 5 inches to 8 inches, it is being scaled by a factor of 8/5. Thus the length (8 inches) is also scaled by a factor of 8/5 and becomes 8 × 8/5 = 64/5 = 12.8 inches.
66)
The ant's leg in this picture is 15cm and know the photograph is 25 times bigger than the actual ant leg. Thus we know
the ant's leg × 25 = the ant's leg in the photo
the ant's leg × 25 = 15cm
the ant's leg = 15/25 cm = 0.6 cm
