Tracy, a utility-maximizing individual with standard (bowed-in toward the origin) indifference curves, consumes only two goods: pizza and soda. What must happen to her consumption of soda
if the price of soda falls?

If the price of soda drops, and Tracy only consumes two goods (soda and pizza), what is likely to happen is that, due to the law of supply and demand, the lower the price, the higher the demand for the good. Thus, if soda drops in price, Tracy will seek to purchase larger quantities of said product, taking advantage of the drop in price to increase its stock levels.

the boy's acceleration toward the girl is 2.08 m/s^2.

explanation:

according the newton's third law, the force causing the girl accelerate towards the boy will be me with equal counter-force causing the boy to accelerate towards the girl. these forces will be of equal magnitude and allows us to determine the boy's acceleration:

the boy's acceleration toward the girl is 2.08 m/s^2.