Answer:
i don't see the graph
Step-by-step explanation:
Answer:
From what I can see of the problem, you CANNOT solve for the half-life of U 235 AND then solve for the length of time to determine the 20% decay.
U-235 half-life is 704,000,000 years. (Wikipedia)
The elapsed time formula = half-life * [log (Beginning Amount / ending amount) / log 2]
elapsed time = 7.04 x 10^8 * [log (100 % / 80%) / log 2]
elapsed time =7.04 x 10^8 * [log (1.25) / .30103]
elapsed time =7.04 x 10^8 * [0.096910 / .30103]
elapsed time = 7.04 x 10^8 * 0.321928047
elapsed time = 226,637,000 years
Step-by-step explanation:
Your best decision would be to find a subject that the entire grade has so it is not biased such as a course class like science or language arts depending on what grade they are referring to if this is not the answer you where looking for I am sorry hope I helped :)
Answer:
35.6t = d
Step-by-step explanation:
71.2 hours every 2 hours
Divide by 2 hours to find how far the bird travels in a single hour:
71.2 / 2 = 35.6
The bird travels 35.6 km every hour.
So given a number d, t is 35.6 times that number.
35.6t = d
