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18 March, 08:42

Mr. Whittaker's science class uses tide gauges to measure annual variations in water levels at different parts of a river, and then compares those variations to the average annual trend. Matea recorded that the water level in one part of the river fell 1.05 millimeters per year for 2.48 years. This data will be compared to the average annual trend, which shows the water level rising 1.8 mm/year. Which number represents the rate at which the water level fell? Which number should the rate be multiplied by to find the total variation in water level?

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  1. 18 March, 09:08
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    This question is not complete because is lacks the options for each question.

    Complete question

    mr. whittaker's science class uses tide gauges to measure annual variations in water levels at different parts of a river, and then compares those variations to the average annual trend. matea recorded that the water level in one part of the river fell 1.05 millimeters per year for 2.48 years. this data will be compared to the average annual trend, which shows the water level rising 1.8 mm/year.

    1) Which number represents the rate at which the water level fell?

    a. - 1.05 mm/year

    b. - 1.8 mm/year

    c. - 2.48 years

    d. - 2.48 mm/year

    2) Which number should the rate be multiplied by to find the total variation in water level?

    a. 1.05 mm/year

    b. 1.8 mm/year

    c. 2.48 years

    d. 2.48 mm/year

    Answer:

    1) Which number represents the rate at which the water level fell?

    a. - 1.05 mm/year

    2) Which number should the rate be multiplied by to find the total variation in water level?

    c. 2.48 years

    Step-by-step explanation:

    Total Variation in the water level is calculated by multiplying the rate at which the water level and number or years at which the rate of the water level fell

    From the question, we can see that the rate at which the water level fell is - 1.05 mm/year and number of years at which the water level fell is 2.48mm

    Hence, Total Variation in the water level is calculated as

    -1.05 mm/year * 2.48 years

    Total variation in the water level = - 2.604mm
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