During a hot summer week, the water level in Wei's pool decreased by 1.9 centimeters. Wei added water to the pool, increasing the level by 3.5 centimeters. During the next week, the water level decreased by 2.4 centimeters. How does the new water level compare to the original water level?

The new water level decreased by 0.8 centimeters compared to the original water.

Step-by-step explanation:

Change = (-1.9) + 3.5 -2.4

             = (-0.8)

john earns $14.00 for two hours of work.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6