Answer:
c + (a + 1.70) = 6.70
Step-by-step explanation:
you start the equation by Subtracting how much more alan has to the total
(this will only be set as an equation do not actually solve it)
then add 1.70 to a
"
6.70 - 1.70 = a + c
(1.70 + a)
c + (a + 1.70) = 6.70 "
Answer:
1. X = 14
2.X =13
Step-by-step explanation:
The angles are 90 degrees. I did math to check if the x values are correct and they are.
210 balloons divided by 70 (the percent) = 3 (1% = 3 balloons)
3 times 100 = 300 Balloons
The total number of balloons purchased is
300 balloons
Answer:
1 3/4
Step-by-step explanation:
1 3/4 is 3/4 more than one.
The mass of substance left after 7 days is 13.09 g
The mass of substance left, N is given by
N = N₀exp(-λt) where λ = decay constant and N₀ = initial mass of substance present = 24 g and t = time
Also, λ = 0.693/t' where t' = half-life of iodine = 8 days
So, λ = 0.693/t'
λ = 0.693/8
λ = 0.086625/day
Since the mass of substance left is N = N₀exp(-λt) and we require the mass of substance after t = 7 days,
N = N₀exp(-λt)
N = 24 gexp(-0.086625/day × 7 days)
N = 24 gexp(-0.606375)
N = 24 g × 0.5453
N = 13.09 g
So, the mass of substance left after 7 days is 13.09 g
Learn more about radioactive decay here:
brainly.com/question/23705307
