QUESTION IMAGE
Question
interactive practice: understand scaled copies and scale drawings
oscar has a map of the campground where he is staying. the scale shows that 4 inches on the map represents an actual distance of 2 miles. oscars tent is at campsite 4a.
what number can you multiply each length on the map by to find the actual distance?
\\(\frac{1}{2}\\)
what is the actual distance from oscars campsite to the beach?
\\(square\\) mi
image of a campground map with campsite 4a, 4b, 4c, 4d, 4e, 4f, a general store, and a beach. the distance from 4a to the beach is \\(2\frac{1}{2}\\) in., and from 4a to the general store is 3 in.
Step1: Find scale factor (mi/in)
We know 4 inches = 2 miles, so calculate the actual distance per inch:
$\frac{2}{4} = \frac{1}{2}$ miles per inch.
Step2: Verify scale factor
This means multiplying map length by $\frac{1}{2}$ gives actual miles.
Step3: Calculate beach distance
Map distance to beach is $2\frac{1}{2}$ in. Multiply by scale factor:
$2\frac{1}{2} \times \frac{1}{2} = \frac{5}{2} \times \frac{1}{2} = \frac{5}{4} = 1\frac{1}{4}$
Step1: Calculate scale factor
Map 4 in = actual 2 mi. So scale factor (actual/map) is $\frac{2}{4} = \frac{1}{2}$ mi/in.
Step2: Find beach actual distance
Map distance to beach is $2\frac{1}{2}$ in. Multiply by scale factor:
$2\frac{1}{2} \times \frac{1}{2} = \frac{5}{2} \times \frac{1}{2} = \frac{5}{4} = 1.25$
Step1: Compute scale conversion factor
$\text{Scale factor} = \frac{2\ \text{mi}}{4\ \text{in}} = \frac{1}{2}\ \text{mi/in}$
Step2: Calculate beach actual distance
$\text{Actual distance} = 2\frac{1}{2}\ \text{in} \times \frac{1}{2}\ \text{mi/in} = \frac{5}{2} \times \frac{1}{2} = \frac{5}{4}$
Step1: Find scale factor (mi per in)
$\frac{2}{4} = \frac{1}{2}$
Step2: Calculate beach actual distance
$2\frac{1}{2} \times \frac{1}{2} = \frac{5}{4}$
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- $\frac{1}{2}$
- $1\frac{1}{2}$ (correction: $1\frac{1}{4}$ is $\frac{5}{4}$ which is 1.25, but exact fraction is $\frac{5}{4}$ or $1\frac{1}{4}$)
Wait, correction: Step3: $2\frac{1}{2}$ inches is $\frac{5}{2}$ inches. Multiply by $\frac{1}{2}$ miles per inch: $\frac{5}{2} \times \frac{1}{2} = \frac{5}{4} = 1.25$ miles.
Final Answer:
- $\frac{1}{2}$
- $1\frac{1}{4}$ (or $\frac{5}{4}$)
Wait, let's recheck: