Saturday

December 20, 2014

December 20, 2014

Posted by **Rachael** on Thursday, December 30, 2010 at 6:11pm.

- math -
**Reiny**, Thursday, December 30, 2010 at 6:23pmYou don't say which way the first helicopter is flying, north or south or ...

I will assume it is flying south.

Make a right-angled triangle with y as the remaining distance to Ghana and x as the remaining distance.

let d be the distance between them

d^2 = y^2 + x^2

2d dd/dt = 2ydy/dt + 2xdx/dt

when x=300 and y = 400

d^2 = 300^2 + 400^2

d = 500 (did you recognize the 3,4, 5 triangle ?)

dd/dt = (400(-20) + 300(-15))/(2(500)) = 12.5

**Answer this Question**

**Related Questions**

math - Helicopter A is flying due north toward a landing point 10 miles away. ...

calculus - An airplane flying west at 300 miles per hour goes over the control ...

middle school - Two news helicopters are flying in the same altitude on the way ...

math - Two helicopters leave Springfield, IL at the same time. One travles north...

Algebra 2 - A commercial freight carrier is flying at a constant speed of 400 mi...

Algebra - A coast guard helicopter receives a distress signal from a boat. the ...

Trig. - An airplane flying at 600 miles per hour has a bearing of 52 degrees. ...

Math - A boat travels 74 miles on a course with direction 34 degrees and then ...

Math Calculus 2 - At a certain instant an aircraft flying due east at 240 miles ...

precalculus - an airplane flying at 550 miles per hour has a bearing of N 52(...