Dana went bowling. The first ball she bowled left her hand at a speed of about 13 miles per hour. If the graph above represents the speed of Dana's bowling ball over time, which of the following statements best describes the speed of the bowling ball?
A.
The speed of the bowling ball decreased slowly at first and then more rapidly.
B.
The speed of the bowling ball increased quickly at first and then more slowly.
C.
The speed of the bowling ball decreased quickly at first and then more slowly.
D.
The speed of the bowling ball increased slowly at first and then more rapidly.

A. ​it generates energy from carbohydrates.b. it requires activation by oxygen.​c. ​it is used by cells to dispose of excess electrons

Answerthis solution will not form a precipitateexplanationsolubility equilbrium:         pbf₂(s)  ⇄ pb²⁺(aq) + 2 f⁻(aq)the solubility product expression is    (we exclude solids from the equilibrium expression).now suppose we have the trial ion product q, which we can define as    then, we can interpret  q as the product of the concentration of the ions that we have and ksp as the product of the ion concentrations that are needed to form a saturated solution.if q > ksp, then that implies that there will be a surplus of ions that exceed the amount that is required to form a saturated solution. a precipitate will then form (the precipitate continually  forms until the surplus ions are removed and q is decreased to ksp's value).if q = ksp, the saturated solution that forms is barely saturated and the precipitate will be minimal.if q < ksp, then the ion concentration will not be enough to form a saturated solution (so no precipitate).using our information, we calculate the trial ion product:     since q = 2.7  × 10⁻⁸ < ksp =  4  ×  10⁻⁸, a precipitate will not form.