HELP ASAP Potassium loses electrons when it reacts with oxygen. Which statement is
true of potassium in this reaction?
A. It oxidizes.
B. It undergoes redox.
C. It undergoes synthesis.
D. It reduces.

If a rock is thrown upward on the planet mars with a velocity of 10 mys, its height in meters t seconds later is given by y − 10t 2 1.86t 2 . (a) find the average velocity over the given time intervals: (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001] (b) estimate the instantaneous velocity when t − 1.