Give me some info one what Jenny and Jeremy did and I can help you solve this :)
If the half-life is t, then every t days, the amount of the radioactive isotope will be cut in half.
(1/2)^(number of half-lives) = 3%
number of half-lives = ln(0.03) / ln(0.5)
This gives the number of half-lives as 5.06.
Then 300 days = (5.06)(length of 1 half-life)
length of 1 half-life = 300 / 5.06 = 59.29 days
Answer: Yo-yo
Concept:
In order to find the Cost Per Toy, we need to do the operation Cost / Toy.
Solve:
Slinky = Cost / Toy = 9 / 5 = $1.8 per toy
Wind-up robot = Cost / Toy = 16 / 8 = $2 per toy
<u>Yo-yo = Cost / Toy = 15 / 6 = $2.5 per toy</u>
Emoji beach ball = Cost / Toy = 3 / 2 = $1.5 per toy
Hope this helps!! :)
Please let me know if you have any questions
-2(x+3)= -2(x+1)-4
-2x-6= -2x-2-4
-2x-6= -2x-6
This equation has no solution. does this help?