The duck gained 0.042 kilograms per week, so we can express its mass as a linear function of weeks as M = 0.042W + 0.05, where M is the mass in kilograms and W is the number of weeks.
We want to find the number of weeks when the mass is 0.890 kilograms, so we can set up the equation:
0.890 = 0.042W + 0.05
Subtracting 0.05 from both sides:
0.89 - 0.05 = 0.042W
0.84 = 0.042W
Dividing both sides by 0.042:
W = 0.84 / 0.042
W ≈ 20
Therefore, the duck's mass will be 0.890 kilograms after approximately 20 weeks.
A duck’s mass at birth was 0.05 kilogram. The duck gained approximately 0.042 kilograms each week.
After how many weeks is the duck’s mass 0.890 kilograms?
1 answer
1 answer