Which is a stretch of an exponential decay function? f(x)= 4/5(5/4)^x
f(x)=4/5(4/5)^x
f(x)=5/4(4/5)^x
f(x)=5/4(5/4)^x

Which speed is the fastest (use 1 mile ≈ 1.6 kilometers)? a. 12 miles/hour b. 18 feet/second c. 19 kilometers/hour d. cannot be determined

The parabola opens: y=√x-4 (principal square root) up down right left

Tiffany drives 285,120 feet before lunch and 628,320 feet after lunch. about how many kilometers does she drive all together