Mr. Yoo lost 12 pounds over the summer by jogging each week. By winter, he had gained 5 ⅜ pounds. Represent this situation with an expression involving signed numbers. What is the overall change in Mr. Yoo’s weight?

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?