This is an easy half-life problem.
Every half-life, a substance loses half its radioactivity. So, after 2 half-lives, a substance will have a quarter of its radioactivity.
2 * 5,700 = 11,400 years
answer is C
Answer:
$5.75x5=$28.75
$28.75-$4.50=$24.25
Step-by-step explanation:
The answer is 45.9 you Add it
Answer:
$70
Step-by-step explanation:
1 - ⅙ - ¼ = (12 - 2 - 3)/12 = 7/12
7/12 × 480 = 280
280/4 = 70
For the first one, find a number in which, when factored, will give you 4.
x² + 4x + 4
x 2
x 2
(x + 2)(x+ 2)
4 is your best answer
2. x² - 10x + ____
Same for this question. Find a number that, when factored, will give you -10
-100
x² - 10x + 25
x - 5
x -5
(x - 5)(x - 5)
25 is your answer
hope this helps
