Question

Nadia built a robot to filter air and water efficiently. She expects the robot to filter more than 343 liters of

air and water while using less than 49 Joules of energy.
12A + 8W > 343 represents the number of minutes the robot filters air A and water IV to hiter more
than 343 liters of air and water.
3A +41V < 49 represents the number of minutes the robot hiters air and water while using less than 49
Joules of energy

Does the robot meet both of Nadia's expectations by filtering air for 20 minutes and filtering water for 15
minutes?

Choose 1 answer.

A. The robot meets both of Nadia's expectations.

B. The robot filters the expected amount of air and water, but it doesn't use the expected amount
of energy

C. The robot uses the expected amount of energy, but it doesn't filter the expected amount of air
and water.

D. The robot doesn't meet either of Nadia's expectations.​

Answer 1

The correct option is;

B. The robot filters the expected amount of air and water, but it doesn't use the expected amount of energy

Explanation:

The given requirements are;

Volume of air and water to be filtered by the robot = 343 liters

The amount of energy consumed by the robot < 49 joules

The number of minutes the robot filters air and water to filter more than 343 liters = 12A + 8W > 343

The number of minutes the robot filters air and with less than 49 Joule of energy = 3A + 4W < 49

Given that filtering air takes 20 minutes, filtering water takes 15 minutes, we have;

To filter more than 343 liters, we have

12*20 + 8*15 = 360 > 343

The robot meets the amount of air and water requirement

To filter with less than 49 joules we have

3*20 + 4*15 = 120 > 49

Therefore, the robot does not meet the energy requirement

The correct option is the robot filters the expected amount of air and water, but it doesn't use the expected amount of energy.