Question

4

y A duck's mass at birth was 0.05 kilogram. The duck gained approximately 0.042
kilogram each week. After how many weeks is the duck's mass 0.890 kilogram?
Ο Α. 10
O B. 17
OC. 20
D. 21

Answer 1

Answer: C. 20

Explanation:

Ley y be the duck mass, and x be the number of weeks

Our equation will be

y = 0.042x + 0.05

Then we plug 0.89 in the y

0.89 = 0.042x + 0.05

0.84 = 0.042x

x = 20 Weeks

So the answer is C. 20 weeks