1. It is a number with fixed value in an algebraic expression

A. Perimeter
B. Letters
C. Variables
D. Constant


2. How many decimal places to the right do we move the decimal point to change km² to m² ?

A.2
B. 4
C. 6
D. 8

3. What is 42 m converted to cm?

A. 420cm
B. 4,200cm
C. 42, 000 cm
D. 420,000cm