Answer:

Step-by-step explanation:
Given
--- Initial Amount
every 10 years
Required
The remaining amount after 300 years
To do this, we make use of:

Where
r = decay rate
T = the period of decay
In 300 years, there are 30 periods of 10 years.
i.e.






A ratio reads left to right and can be written in 3 different ways. for example, 3:5, 3 to 5, or 3/5
if you have a problem that says something like: for every 3 people there is 1 child, the ratio is 3 to 1. Hope this was helpful in in 6th grade too and in advanced math!
To find the original length you must take away the add-ons. To do so we know that they added 7 and A= l*l (or l squared). They added the 7 to the length so multiply 7*7 (49) subtract your answer from 169 (120) and that's your new area. To find the original length divide by 4 (I believe) and get 30m2
Albert bought 2 pounds of catfish and 2 pounds of salmon
Let c represent the amount of catfish in pounds and s represent the amount of salmon in pounds.
He spent a total of $12 on salmon and catfish and bought a total of 4 pounds. Hence:
c + s = 4 (1)
4c + 2s = 12 (2)
Solving equations 1 and 2 simultaneously gives:
c = 2, s = 2
Albert bought 2 pounds of catfish and 2 pounds of salmon
Find out more on equation at: brainly.com/question/2972832