Answer:
z=21, x=1, y=9
Step-by-step explanation:
3z=63 (a property of a kite)
z= 21
3x-1=2x (another property of a kite)
x=1
y+4=13 (another property of a kite)
y=9
Be sure to know your properties!
Answer:
1 1/2.
Step-by-step explanation:
If 1/2 of a cup covers 1/3 add it twice you get 2/2 and you get 2/3 add it one more time and you get 1 1/2 or 3/3.
Answer:
y= 27x/107
Step-by-step explanation:
let me know if you want a step by step explanation!
One Half-Life of polonium = 138 days
We have to find the number of half-lives that occur in 1104 days. For this we simply divide 1104 by 138.
Number of half-lives in 1104 days = 1104/138 = 8 half-lives
Thus, in 1104 days polonium-210 undergoes 8 half-lives i.e. it is halved 8 times.
Initial Amount of sample= 30 gram
The amount remaining after 8 half-lives will be = 30 x (0.5)⁸ = 0.1171875 grams.
This means, after 1104 days, 30 gram sample of polonium-210 will be reduced to 0.1171875 grams only.
