The Percentage $p ( t )$ Of Children Who Are Able to Speak in at Least

question 50

Multiple Choice

The percentage $p ( t )$ of children who are able to speak in at least single words by the age of t months can be approximated by the equation. $$p ( t ) = 100 \left( 1 - \frac { 12,156 } { t ^ { 4.17 } } \right)$$
What percent of children are able to speak in at least single words by the age of 14 months Round to the nearest percent.

• A)67%
• B) 80%
• C) 55%
• D) 73%
• E) 20%

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