Chris is standing 40m from the base of a cliff and noted that the height of the cliff was 70m. What was the angle at which he was looking up? Assume his eye level is 1m above the ground.

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

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