Answer:
There are plenty of pairs
Step-by-step explanation:
1, 120
2, 60
3, 40
4, 30
5, 24
6, 20
8, 15
10, 12
Answer:
Step-by-step explanation:
Given that,
y varies directly as x. It means,
y = kx
Where
k is the constant of variation
or
So, the constant of variation is 
.
Answer:
<h2>13</h2>
Step-by-step explanation:
3z + 5 = 4z - 8
⇌ 5 + 8 = 4z - 3z
⇌ 13 = z
The first one is right but the second one is 1/8 (B)
Answer:
8923 years
Step-by-step explanation:
Half life of C-14 = 5730yrs
decay rate= 34%
Halt life (t^1/2) = (ln2) / k
5730 = (ln2) /k
k = (ln2) / 5730
k = 1.209 * 10^-4
For first order reaction in radioactivity,
ln(initial amount) = -kt
ln(34/100) = -(1.209*10^-4)t
-1.0788 = -(1.209*10^-4)t
t = -1.7088/ -1.209*10^-4
t = 8923 years
