On a map, the scale shown is 1 inch : 3 miles. If an island is 0.5 square inches on the map, what is the actual area of the island?
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Answer:
4.5
Step-by-step explanation:
First we need to turn the ratio of 1 : 3 into a fraction
1:3 = 1/3
Next we need to square that fraction
1 x 1 = 1
3 x 3 = 9
Then we turn those numbers into a fraction
1/9
We turn the .5 into a fraction
.5/x
And cross multiply both fraction by each other
1/9 x .5/x
1 x X = X
9 x .5 = 4.5
So
4.5 = X
The actual island's area is 4.5 square miles.
Given a rectangle with duration l and width w, the formula for the place is A = l*w (rectangle). that is, the vicinity of the rectangle is the length extended by the width. As a special case, as l = w in the case of a rectangular, the location of a rectangular with side duration s is given by using the components: A = s^2 (square).
Take a pencil and draw a rectangle on a piece of paper. it is a 2-D discern. the space the shape takes up on the paper is referred to as its vicinity. Now, imagine your rectangular is made of smaller unit squares.
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