Manuel is also in Mr. Whittaker’s science class. He observed that the water level rose 1.8 millimeters per year, which matches the average annual trend. This occurred for 2.2 years. Explain how to determine the total variation in water level. How can you check your answer?
Answers
Given : Manuel is also in Mr. Whittaker's science class. He observed that the water level rose 1.8 millimeters per year, which matches the average annual trend. This occurred for 2.2 years.
To Find : how to determine the total variation in water level.
Solution:
water level rose 1.8 millimeters per year,
Increase of water level in 1 Year = 1.8 mm
Increase of water level in n Year = n times 1.8 mm
Hence to find increase in water level we need to multiply 1.8 by 2.2
increase of water level in 2.2 years = 2.2 * 1.8
= (22/10) (18/10)
= (22 * 18)/(100)
22
x 18
_____
176
22
_____
396
= 396/100
= 3.96
total variation in water level. = 3.96 mm
Approximation 2.2 * 1.8 = 2 * 2 = 4 mm close to 3.96 mm
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This is what they put as a sample response!
To determine the total variation in water level, multiply 1.8 mm/year by 2.2 years. The exact answer is 3.96 mm/year. Use rounding to check the answer by using the problem 2(2) =4. 4 is close to 3.96.
Step-by-step explanation:
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