The maximum length of a certain type of fish is 64 centimeters. The difference between the maximum length and the length at age years is given by $D = 60.8 \times 0.81 ^ {t }$ centimeters. Write a formu-
La that gives the length L , in centimeters, of the fish at age years.
A) $L = 64 + 60.8 \times 0.81 ^ { t}$
B) $L = 64 - 60.8 \times 0.81 ^ { t}$
C) $L = 64 \times 60.8 \times 0.81 ^ {t }$
D) $L = 60.8 \times 0.81 ^ { t } - 64$

Question

The maximum length of a certain type of fish is 64 centimeters. The difference between the maximum length and the length at age  years is given by $D = 60.8 \times 0.81 ^ {t }$ centimeters. Write a formu-
La that gives the length L , in centimeters, of the fish at age  years. 
A) $L = 64 + 60.8 \times 0.81 ^ { t}$ 
B) $L = 64 - 60.8 \times 0.81 ^ { t}$ 
C) $L = 64 \times 60.8 \times 0.81 ^ {t }$ 
D) $L = 60.8 \times 0.81 ^ { t } - 64$

Quizplus · Accepted Answer

The difference between the maximum length and the length at a certain age is given by $D = 60.8 \times 0.81 ^ {t}$, where t is the age of the fish. We need to find the length of the fish at age 11 years, so we need to subtract the difference from the maximum length: 
$L = 64 - 60.8 \times 0.81 ^ {t}$
Therefore, choice B is the correct answer.

The Maximum Length of a Certain Type of Fish Is D=60.8×0.81tD = 60.8 \times 0.81 ^ {t }D=60.8×0.81t

The Maximum Length of a Certain Type of Fish Is $D = 60.8 \times 0.81 ^ {t }$