2 years ago

A pair of shoes costs $109 at Sneaker City. At the labor Day sale, they are 20% off. What is the

Mathematics

1 answer:

Alik [6]2 years ago

8 0

Answer: $108.8

Step-by-step explanation: you do 109.00-20% and you get 108.8

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cestrela7 [59]

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Step-by-step explanation:

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2 years ago

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3 years ago

Josue broke a cell sample into 12 batches, each weighing 6.9 x 10 ^-10

Klio2033 [76]

Using proportions, it is found that the original sample weighed $8.28 \times 10^{-9}$ grams.

This question is solved by proportions, using a rule of three.

The weight of 1 batch, in grams, is of $6.9 \times 10^{-10}$ . How much do the sample of 12 batches weigh?

The rule of three is:

1 batch - $6.9 \times 10^{-10}$ grams.

12 batches - x grams

Applying cross multiplication:

$x = 12 \times 6.9 \times 10^{-10} = 82.8 \times 10^{-10}$

Applying scientific notation:

$8.28 \times 10^{-9}$

The original sample weighed $8.28 \times 10^{-9}$ grams.

You can learn more about proportions at brainly.com/question/24372153

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3 years ago

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