Answer:
That is probably tellurium 134 which has a half-life of 41.8 minutes but we'll stick with the 40 minutes you stated.
240 / 40 minutes equals precisely 6 half-lives.
Every half-life reduces a radioactive substance by one half.
So 6 half-lives reduces it by 1 / (2^6) which equals 0.015625
576 * .015625 = 9 grams exactly.
Step-by-step explanation:
Answer:
4/5
Step-by-step explanation:
The rise is 4, and the run is 5. The rise comes first, so the answer is 4/5. The line is positive.
X = 1st number
x + 1 = 2nd number
x + 2 = 3rd number
x + (x + 1) + (x + 2) = 18...combine like terms
3x + 3 = 18
3x = 18 - 3
3x = 15
x = 5
x + 1 = 5 + 1 = 6
x + 2 = 5 + 2 = 7
7 + 6 + 5 = 18
13 + 5 = 18
18 = 18 (correct)
largest number is 7
Given that the number of bridges has been modeled by the function:
<span>y=149(x+1.5)^2+489,505
To find the year in which, y=505000 we shall proceed as follows:
From:
</span>y=149(x+1.5)^2+489,505
substituting y=505000 we shall have:
505000=149(x+1.5)^2+489,505
simplifying the above we get:
0=149(x+1.5)^2-15495
expanding the above we get:
0=149x^2+447x+335.25-15495
simplifying
0=149x^2+447x-15159.8
solving the quadratic equation by quadratic formula we get:
x~8.69771 or x~-11.6977
hence we take positve number:
x~8.69771~8.7 years~9 years
thus the year in which the number will be 505000 will be:
2000+9=2009
Rose is ordering a submarine sandwich from the comer del The del charges $6.25 for a 7-inch sub Additional toppings cost extra. Rosa's sandwich
two extra loppings costs $7.75. What is the cost per additional topping?
per topping
