Friday

September 19, 2014

September 19, 2014

Posted by **Jo** on Tuesday, October 25, 2011 at 12:10am.

- Calculus -
**Reiny**, Tuesday, October 25, 2011 at 8:37amlet the time passed since the biker passed directly underneath be t seconds

Make a diagram showing the distance between them as d ft

I see it as

d^2 = (17t)^2 + (65+t)^2

when t=3

d^2 = 51^2 + 68^2

d = √7225 = 85

2d dd/dt = 2(17)(17t) + 2(65+t)

divide by 2 and solve for dd/dt

dd/dt = (17(17t) + 65+t)/d

when t=3 and d = 85

dd/dt = (17(51) + 68)/85 = 11 ft/s

**Answer this Question**

**Related Questions**

Calculus - A hot-air balloon is 180 ft above the ground when a motorcycle ...

calculus - A hot-air balloon is 150 feet above the ground when a motorcycle ...

Hot-air balloon - A hot-air balloon is 180 ft above the ground when a motorcycle...

ph 411 - a baloon is rising at a constant speed of 10m/s. when the balloon is ...

physics - A hot air balloon is ascending straight up at a constant speed of 6.50...

calculus - INTEGRATION - A balloon, rising vertically with a velocity of 16 feet...

Calculus - A balloon leaves the ground 500 feet away from an observer and rises ...

Math - A hot air balloon is rising vertically. From a point on level ground 125 ...

Pre-Calc - A hot-air balloon is floating above a straight road. To estimate ...

Physics - A balloonist, riding in the basket of a hot air balloon that is rising...