3. A cellular phone company offers a contract that costs 14.99€ plus 06€ per minute. Find the total number of minutes talked if the bill for October was 20.21€.

The total number of minutes is 87 minutes.

Step-by-step explanation:

Correct statement is:

3. A cellular phone company offers a contract that costs 14.99 € plus 0.06 € per minute. Find the total number of minutes talked if the bill for October was 20.21 €.

From statement we know that total bill (), measured in euros, minus a fixed cost (), measured in euros, and is directly proportional to total time (), measured in minutes. That is:

(Eq. 1)

Where is the proportionality ratio, measured in euros per minute.

If we know that , and , then the total number of minutes is:

The total number of minutes is 87 minutes.

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.