What is true of the rate of radioactive decay? a. the rate is constant. b. the rate is continuously accelerating. c. the rate is continuously decelerating. d. the rate is exponentially accelerating.

Can someone me with questions 15 to 17 plz.

Imagine that twenty i.u.’s of enzyme z were catalyzing the above reaction for one minute, under vmaxconditions, in a 3.00 ml assay volume. the assay is buffered with 20 mm phosphate buffer, ph 7.60. what will the ph be at the end of that one minute?

May someone me with these science questions