Monday

September 1, 2014

September 1, 2014

Posted by **kchik** on Thursday, November 22, 2012 at 12:36am.

a) 2 hours after it leaves the point P

b) 7 hours after it leaves the point P

- calculus -
**drwls**, Thursday, November 22, 2012 at 8:31amThe distance from point P after t hours is

d = sqrt[30^2 + (10 t)^2]

= sqrt(900 + 100 t^2)

dd/dt = [ (1/2)/( sqrt(900 + 100 t^2)]*200 t

Plug in the t value and compute the corresponding rate of change of d

**Related Questions**

calculus - QUESTION 3 A boat sails 30 miles to the east from a point P, then it ...

calculus - A boat sails 30 miles to the east from a point P, then it changes ...

physics - A boat sails 5.0(45 degrees W of N). It then hanges direction and ...

Physics - A boat is at a point 120km West and 60km South of its destination. It ...

Physics - A boat is at a point 120km West and 60km South of its destination. It ...

pre calc - Lighthouse B is 8 miles west of lighthouse A. A boat leaves A and ...

calculus - Boat A leaves the dock at 12pm heading due South at a constant speed ...

physics - A boat sails 251 km to the East and then 534 km to the North. What is ...

mathematics - a boat sails 150km on a bearing of 42 degree and then 250km due ...

Trig - A sail boat on lake Huron leaves Southampton and sails 20degrees west of ...