[-/3 Points]\ SCALCET9 3.7.024.EP.\ the time

t

(in hours after midnight) on that day.\

D(t)=7+5cos[0.503(t-6.75)].

\ Find the derivative

D^(')(t)

.\

D^(')(t)=

\ How fast (in

(m)/(h)

) was the tide rising (or falling) at the following times? (Round your answers to two decimal places.)\ (a)

3:00a.m

.\

(m)/(h)

\ (b)

4:00a*m

.\

(m)/(h)

\ (c)

8:00a.m

.\

the time t (in hours after midnight) on that day. D(t)=7+5cos[0.503(t6.75)]. Find the derivative D(t). D(t)= How fast (in m/h ) was the tide rising (or falling) at the following times? (Round your answers to two decimal places.) (a) 3:00 a.m. m/h (b) 4:00 a.m. m/h (c) 8:00a.m. m/h (d) 9:00 a.m. m/h