A chemical reaction consumes water at a constant rate. The reaction started at 1:40pm. The mass of water
t
minutes after the reaction starts is
m(t)
grams. You are told
m(0)=48
and
m ′ (t)=−2
all the time. Show work for each part. (a) [2pts] Find the formula for the mass of water
m(t)=
grams (b) [1pts] How many grams of water remained at
1:45pm
? grams (c) [2pts] At what time did the reaction end ? (write an answer like
3:27
to mean 27 minutes past 3 )
