Answer:
The answer is 1001101
Step-by-step explanation:
77 base 10 to base 2 is 1001101
The value of 6 is 6 hundreths
You are lazy... do it on your own.
Answer: 
Step-by-step explanation:
We know that the general form of the exponential decay formula is
, where y is final amount remaining after t time, A is the original amount and r is the rate of decay
Now, the ratio of strontium-90 remaining, p , as a function of years, t , since the nuclear accident. 
Hence, the ratio of remaining since the nuclear accident is 