Answer:
Divide 15 by 12. The remainder, 3, will be 3/12, or 1/4. Add 1 and 1/4, and you'll get 1 1/4.
Step-by-step explanation:
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.
Answer:
Since the exponent of the scientific notation is negative, move the decimal point 2 places to the left.
0.96
