0.85 is equal to 6/7 because you divide six by seven....Hope this helped.
36
a= 1/2 b x h
= 5cm x 72cm
= 360cm
Answer:
x-3x^3
Step-by-step explanation:
^ means to the power of btw
Given that the half life of 3H is 12.3 years.
The amount of substance left of a radioactive substance with half life of

after t years is given by

Therefore, the number of years it will take for 18% of the original tritinum to remain is given by

Therefore, the number of <span>years that the time could be read at night is 30.4 years.</span>