Answer:
six less than twice y is represented by 2y - 6
Answer:
C. 16√5
Step-by-step explanation:
a squared plus b squared equals c squared!
Answer: 30g
Step-by-step explanation:
In this question (t½) of isotope is 40 days, which means that after 40 days half of the sample would have decayed and half would be left as it is.
After 40 days ( first half life) 240 /2 = 120 g decays and 120 g remains left.
After another 40 days ( two half lives or 80 days) 120 /2 = 60 g decays and 60 g remains left .
after three half lives or 120 days, 60/2 = 30g decay and 30 g of the isotope will be left.
1 + 1 + 1 + 2 = 5
5 x 9 = 45
Therefore, the total number of km is 45.
