If a toy that costs $2.99 is at a 30% discount then you first need to make 30% a decimal.
30% = .3
Now multiply $2.99 by .3 to find the discount which is .897
Since .897 has a thousandths place we need to round that which would make it 90 cents.
Now we know there is a 90 cent discount on a $2.99 toy.
take $2.99 - 90 cents = $2.09
The toy costs $2.09 after a 30% discount
The sum of the ages of Bryce and Sonya is 72 years old. 6 years ago, Bryce’s age was 3 times Sonya’s age. How old is Bryce now?
1. parallel lines have same slope
Answer: 
Step-by-step explanation:
We know that the general form of the exponential decay formula is
, where y is final amount remaining after t time, A is the original amount and r is the rate of decay
Now, the ratio of strontium-90 remaining, p , as a function of years, t , since the nuclear accident. 
Hence, the ratio of remaining since the nuclear accident is
