Formulae Answers

1. a. $410

b. $1890

2. a. 30 km/h

b. A = 60 cm2

c. C = 37.2 cm

d. V = 40 cm3

e. h = 5 m

3. C = $85

4. a. C= 0.2x + 0.3y + 3

b. Cost is $68