Answer:
1. Length when found = length at birth + (age when found × growth each year); 2. 6.3 yr
Step-by-step 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.
