Answer:
Percentage of (226Ra) after 900 years is 68%
Step-by-step explanation:
Let P(t) be the amount of (226Ra) present at any time t
Half life of (226 Ra) = 1599 years
If P₀ is initial amount of (226 Ra) then after 1599 years
P(1599)=P₀/2
Decay i amount of radioactive substance is related to time t as
To find value of k
Percentage of radioactive element is:
Amount after 900 years
Answer: She was buggin'
Step-by-step explanation:
If you divide <u>the fact that she's a teacher</u>
kids can smell sometimes <u> </u>
Logically you would get: maybe she thought she smelled something
But when you apply the 'mind your own business rule, it cancels out any chance of her turning around to ask you that
so you're answer is: she was buggin'
Other possible answers:
"No that's just your upper lip sis"
"Did you?"
*rolls eyes and ignores the question all together
Divide total miles driven by number of gallons of gas used.
243 miles / 9 gallons = 27 miles per gallon
324 miles / 12 gallons = 27 miles per gallon.
She can drive 27 miles on one gallon of gas.
Answer:
x= hot dogs
y= soda
Total sold
1 x + 1 y = 87 .............1
2 x 0.50 y = 78.50 .............2
Eliminate y
multiply (1)by -0.50
Multiply (2) by 1.00
-0.50 x -0.50 y = -43.50
2 x + 0.50 y = 78.50
Add the two equations
1 x = 35.00
/ 1
x = 35.00
plug value of x in (1)
1 x + 1 y = 87
35 + y = 87
y = 87 -35
y = 52
y = 52.00
x= 35 hot dogs
y= 52 soda
Step-by-step explanation:
The answer should be 6a-18 .
