Question

The volume y of water (above/below the average amount of water) in a lagoon is given by y= 6000 cos ( pie t/6 - pie/4) .(sorry, don't know symbol for pie on keyboard). t is the time in hours after midnight.
complete following table
t..............y
0.0..........4242.6
1.0..........?
2.0..........?
3.0..........?
4.0..........1552.9
5.0..........? etc. up to 24.0

Plot a graph on graph paper for 0<= t<=24
Draw a tangent line to the curve at t=4 and measure slope
Rate of flow is given by dy/dt. Find expression for flow.

Answer 1

so what part u dont undestand?

Answer 2

all of it

Answer 3

im stuck on the rate of flow bit, no idea how to do this bit

Answer 4

i dont understand that part either Rate of flow is given by dy/dt
but they are asking for flow
so we will get the first equation again y= 6000 cos ( pie t/6 - pie/4)

Answer 5

hello

Answer 6

ok im going to solve this, bear with me

Answer 7

completing the table is straightforward, use a calculator