He Wall Street Journal reported that Coca-Cola sells about 47% of all soda pop consumed worldwide.
Suppose your observation of a random sample of 216 students who selected a soft drink from school
vending machines showed that 81 chose a Coke product. Does this indicate that the soft drink market
share of Coca-Cola at the school is different from 47%?

how do I solve this?

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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1/3 + 1/5 = 8/15.

step-by-step explanation:

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isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c