Question

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?

Answer 1

Answer:

To find the total variation in water level,I would multiply 1.8 by 2.2,equals 3.96.To check the answer, I would round the numbers and multiply them. Ex.: 2(2) =4. 4. Four is actually really close to 3.96!

Answer 2

Total variation in water level = 3.96 mm

To solve this, we will use the distributive property of multiplication.

• It rose by 1.8 mm each year.

Since it occurred for 2.2 years, then we can express it as;

1.8(1) + 1.8(1) + 1.8(0.2)

Expanding the bracket gives us;

1.8 + 1.8 + 0.36 = 3.96 mm

• To check our answer, we will just multiply rise in water level per year by the number of years; 1.8 × 2.2 = 3.96 mm.

• This confirms that distributive property gives the same value in multiplication.

Read more at; brainly.com/question/16516697