Question

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1. use exponential notation to write an expression for the area of the square in square units.
2. use exponential notation to write an expression for the area of the square in square units.
3. use exponential notation to write an expression for the combined area in square units of the squares from problems 20 and 21.

Explanation:

Step1: Identify side length of square 20

The square has 4 units per side, so side length $s_1 = 4$.
Area formula for square: $A = s^2$
Expression: $A_1 = 4^2$

Step2: Identify side length of square 21

The square has 6 units per side, so side length $s_2 = 6$.
Expression: $A_2 = 6^2$

Step3: Calculate combined area (Q22)

Add the two area expressions.
Expression: $A_{total} = 4^2 + 6^2$

Answer:

1. $4^2$
2. $6^2$
3. $4^2 + 6^2$