Question

A baby was born 3/4 of a month early. At birth its weight was 7/8 kilograms, which is 9/10 kilograms less than the average weight of a newborn otter in the aquarium. What is the average weight of a newborn otter?

Answer 1

To find the average weight of a newborn otter, we need to determine the weight of the baby at birth and calculate the average weight of a full-term newborn otter. By solving the problem step by step using the given information, it can be determined that the average weight of a newborn otter is approximately 1.3125 kilograms.

Step-by-step explanation:

To find the average weight of a newborn otter, we need to determine the weight of the baby at birth and calculate the average weight of a full-term newborn otter.

The baby was born 3/4 of a month early and weighed 7/8 kilograms. We can calculate the average weight of a full-term newborn otter by adding the weight of the baby at birth to the weight difference.

Let's solve the problem step by step:

1. Convert 3/4 of a month to kilograms. (Assuming each month has 30 days, 1/4 of a month would be 7.5 days, and 3/4 of a month would be 22.5 days)
   There are 0.45 kilograms gained per month, so the baby gained 0.45 * (22.5/30) = 0.3375 kilograms.
2. Add the weight gained to the baby's weight at birth:
   7/8 + 0.3375 = 1.2125 kilograms.
3. Divide the weight of a full-term newborn otter by the number of months (approximately 9 months) to find the average weight gained per month:
   9/10 ÷ 9 ≈ 0.1 kilograms.
4. Add the weight gained per month to the baby's weight:
   1.2125 + 0.1 = 1.3125 kilograms.
   Therefore, the average weight of a newborn otter is approximately 1.3125 kilograms.