The number of words in a child's vocabulary is a function of the child age. The formula for the numbers of vocabulary of typical children between the ages of 20 Months and 50 months is n=60a - 900 where a represents the child's age in months and n represent the number of words that the cold uses correctly. How many words does a typical 25-months old child know?
Answers
Answer:
600
Step-by-step explanation:
n=60×25-900
n=1500-900
n=600
Given : The number of words in a child's vocabulary is a function of the child age.
The formula for the numbers of vocabulary of typical children between the ages of 20 Months and 50 months is n=60a - 900
where a represents the child's age in months and
n represent the number of words that he could uses correctly.
To Find : How many words does a typical 25-months old child know?
Solution:
n=60a - 900
a represents the child's age in months
25-months old child
=>a = 25
Substitute a = 25 in the equation
n = 60a - 900
n = 60(25) - 900
=> n = 1500 - 900
=> n = 600
Hence a typical 25-months old child know 600 words
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