A certain kind of animal weighs about 75 pounds at birth and gains about 2 pounds per day for the first few weeks. Determine those days for which the animal's weight is more than 125 pounds.

Question

A certain kind of animal weighs about 75 pounds at birth and gains about 2 pounds per day for the first few weeks.  Determine those days for which the animal's weight is more than 125 pounds.

anonymous · Answer

hey

anonymous · Answer

Hello

anonymous · Answer

is this the exact question? about and few aren't great words for a math problem

anonymous · Answer

Oh sorry, I forget to add the remainder here it is.  The animal's weight is more than 125 pounds when the animal is more than how many days old.

anonymous · Answer

What we have here is an equalities problem. When you are dealing with said [in]equalities problems, it is most helpful to state your goal in normal words, instead of saying "Determine those days for which the animal's weight is more than 125 pounds," say: "At what point in time is the animal's weight greater than 125 pounds?"

This is a simple linear equation problem. You have two constants, the animal weighs 75 pounds right now and the animal gains 2 pounds every day.

In math terms, your animals weight at t=0 (t is in days) is 75. The animal gains 2 pounds per day translates into 2*t. Therefore, Weight = 2t + 75. In English, the weight of the animal is equal to 2 pounds PER day and weighs 75 pounds initially.

W= 2t + 75

Now, your job is to figure out when the weight is over (>) 125 pounds so if 2t + 75 is equal to the weight, your job is to find:

2t + 75 > 125

Solve:

2t + 75 > 125
2t + 75 - 75 > 125 - 75
2t > 50
2t/2 > 50/2
t > 25 days.

The animals weight is over 125 pounds AFTER 25 days.

anonymous · Answer

Sorry, accidentally double posted.

anonymous · Answer

Thanks!

anonymous · Answer

No problem. I will assist you with your newer question if you want to jump on over there ;)