Answer:
194.5315427 grams
Step-by-step explanation:
The half-life of element x would be 66 years. So, after 20 years you would have:
.5^(20/66) x 240=0.810548 x 240
=194.5315427 grams of the element left ......
Answer: 136,000,000 ( hope it helped <3 )
Step-by-step explanation:
There are two equations in the system of equations in this problem.
Let x = lemonade and y = hot dogs
First equation
x + y = 86
This says that the total sold hot dogs and lemonades add up to 86 sold.
Second equation
2x + 5y = 330
This says that $2 for each lemonade, $5 for each hot dog. The total amount earned is $330.
Only these two equations are true and needed.
Answer:
25%
Step-by-step explanation: