1. Objective- To use variables in formulas to describe situations.
Formula- an equation which defines the relationship of one variable to other variables or numbers.
A = L w L
Area is described in terms of length and width. w

2. h 1
A = b h 2 b
A is given in terms of b and h.

3. A perfect game in bowling is 300. Most players play with a handicap.
H= Handicap
A= Average bowling score
H = 0.8(200 - A)
If my average is 130 and
Mr. Roberts is 185, find
our handicaps.

4. Estimate the number of cars allowed on a freeway.
N = estimated # of cars
allowed on a roadway.
L = # of lanes on the road.
d = length of road (ft.)
s = average speed (mph)
20 L d
N =
600 + s 2
Problem:
Find N if the length of
the road is 200 yards, the
number of lanes is 3, and
the average speed is 60mph.

5. Volume of the Earth V = r 4 3 Volume Formula of a sphere Problem:
If the radius of the earth is
approximately 8000 miles,
find its volume.