Question

Use the buttons below to build an equation with words and symbols.

Answer 1

1. Length when found = length at birth + (age when found × growth each year); 2. 6.3 yr

Explanation:

1. The word equation

Length when found = length at birth + (age when found × growth each year)

2. The calculations

5 m = 2.6 m + (age when found × 0.38 m/yr)

Do the multiplication first (PEMDAS)

5 m = 2.6 m + 0.38 × age when found m/yr

Subtract 2.6 m from each side of the equation

2.4 m = 0.38 × age when found m/yr

Divide each side by 0.38 m/yr

6.3 yr = age when found

The killer whale is 6.3 yr old.