Answer:
x=0.107
Step-by-step explanation:
First we distribute 13 to x and 15. That gives us 13x+15x=3. Now we add 13x and 15x, that gives us 28x=3. Now we divide by 28 on both sides. That gives us x=0.107
Answer:
Step-by-step explanation:
Decay of carbon - 14 is exponential in nature . It decays as follows .
λ is called decay constant .
λ = .693 / T where T is half life .
Half life of carbon-14 is 5700 years
λ = .693 / T
= .693 / 5700
= 12.158 x 10⁻⁵ year⁻¹
N = .71 N₀
Taking ln on both sides
ln .71 = - λ t
ln .71 = - 12.158 x 10⁻⁵ t
-0.3425 = - 12.158 x 10⁻⁵ t
t = .3425 / 12.158 x 10⁻⁵
2817 years .
Answer:
I think it's B, I might be wrong though
Your answer is 500
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Since they buy 2 $6.50 tickets, they already spend $13 without buying any popcorn or drinks.
For the expression, you can write-
$5.50d + $6.00p + $13 // d representing however many drinks they buy and p representing the amount of popcorn they buy.
This expression will give you the total amount of money spent with varying amounts of drinks and popcorn bought.