5.(a) describe the curve defined by

(b) describe the curve defined by

6.(a) consider the curves defined by

what roles do *a*, *b* and *c* play in the shape of the curves?
>

(b) from part *a*, set *a* and *b* to 1 and *c* to 2. How much vertical increase in *z* is there for each revolution around the *z* axis? This quantity is called ``pitch".

7. Describe the curves in defined by

in particular, what effect do *A*, *B* and *w* have on the curve? Take as
a starting point values *A*=10, *B*=1, and *w*=16; also **numpoints**=500 helps.

8. The French racing team is driving their race car around a track, with
their position described by
They are practicing for an upcoming race. Meanwhile, the Hungarian
endurance racing team is driving cross country to test their equipment
and endurance for another upcoming race. Their position at any time
is described by (60*t* - 20, -30*t* +11) .

(a) Will the Hungarian team ever cross the race track? If so, where?

(b) Will the Hungarian and French cars collide? If so, where?

(c) How long is the race track?

**Note:** all expressions above are in miles and hours. If any
integrals are needed, **evalf(int** may produce better results than **int**.

Wed Feb 19 11:13:36 EST 1997