How does an acid base indicator work?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

Label a-f based on the table using c for concentrated and d for dilute

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?