Answer:
20 grams
Step-by-step explanation:
20 years is 2 half lives
1/2 * 1/2 = 1/4
1/4 * 80 = 20 grams
Answer:
Step-by-step explanation:
The answer is b (1,-1)
Answer:
C
Step-by-step explanation:
This sign "≤" has both the less sign and the equal sign so it indicates that -14 is less than or equal to x.
Answer:
660
Step-by-step explanation:
y x .40= 264
solve for y