Answer:
Kana's height is 150 centimeters at the age of 160 months.
Explanation:
We are told that Baby Kana's parents measure her height every month. H(t) models Kana's height (in centimeters) when she was t months old and we are asked to tell what does the statement H(160)=150 mean.
We can see that this is a function and each input is related to exactly one output.
Since we know that t represents number of months and H(t) represents Kana's height in centimeters after t months. 160 is number of months and 150 is height in centimeters. 
Therefore, 
 means that Kana's height at the age of 160 months is 150 centimeters.
 means that Kana's height at the age of 160 months is 150 centimeters.