Leo’s backpack weighed exactly 12.7 kilograms, a fact he knew because he’d measured it three times to avoid carrying it. But now, at 11:47 PM, the backpack sat open on his desk, and from it glared Freefall Mathematics: Velocity Book 4 — Chapter 9: Parametric Equations of Projectile Motion.
The answers for Freefall Mathematics resources are generally not available to the public in a separate "answer key" format. Instead, the system operates through a model: Freefall Mathematics Velocity Book 4 Answers