Answer:
66
Step-by-step explanation:
(z-33)/z = 1/2
2z-66=z
z=66
Yes, this is proportional, if that's what your asking.
2
She ran the last 100 meters in 2:15 -1:25 = 0:50, so her average speed was
... (100 m)/(50 s) = 2.0 m/s
