1. **State the problem:** We need to determine to which of the given options the Peregrine falcon (speed up to 389 kph) is inferior in terms of speed. 2. **Convert all speeds to a common unit, kph (kilometers per hour), to compare.** 3. **Option a: Koenigsegg Agera RS at 260 mph** - Convert mph to kph using $1\text{ mi} = 1.609\text{ km}$ - Speed $= 260 \times 1.609 = 418.34$ kph 4. **Option b: Speed boat travelling 100 km in 20 minutes** - Convert 20 minutes to hours: $\frac{20}{60} = \frac{1}{3}$ hour - Speed $= \frac{100\text{ km}}{\frac{1}{3}\text{ hour}} = 300$ kph 5. **Option c: Sailfish speed 109,435 meter/hour** - Convert meters/hour to km/h: $\frac{109435}{1000} = 109.435$ kph 6. **Option d: Cheetah running 75 mph** - Convert mph to kph: - Speed $= 75 \times 1.609 = 120.675$ kph 7. **Compareall speeds:** - Peregrine falcon: 389 kph - Koenigsegg Agera RS: 418.34 kph - Speed boat: 300 kph - Sailfish: 109.435 kph - Cheetah: 120.675 kph 8. **Conclusion:** The Peregrine falcon is slower only than the Koenigsegg Agera RS (418.34 kph > 389 kph). **Final answer:** a. a Koenigsegg Agera RS cruising at 260 mph along the highway