Set this up as
10 = 40 (1/2)t/28
and solve for t in years.
10/40 = (1/2)t/28
log(0.25) = (t/28) log(0.5)
t = 28 log(0.25) / log(0.5) years = 56 years
Test the answer:
56 years = 2(28 years) = 2 half-lives, so the remaining amount should be 1/2 of 1/2 of the initial amount, i.e. 1/4 of the initial amount, and 10 mg = 1/4 of 40 mg.
A Tweet From D. Trump Would Be Primary
A. Marine West Coast Climate - sunny, mild
Marine West Coast Climate is also called Oceanic. It is characterized with relatively narrow annual temperature range and features a warm (but not hot) summers and cool (but not. cold) winters.
B. Tropical wet and dry - <span>Heavy downpours of rain
</span><span>All twelve months in the tropical climate regions have mean temperatures of at least 18 °C.</span>
<span>C. Moderate Mediterranean - mild and rainy
</span>This climate<span> is known for warm to hot, dry summers and mild to cool, wet winters. </span><span>
D. Tundra - cold
</span>Tundra is the climate with largest average precipitation per season (4.5 inches.) The type of precipitation that falls in this climate<span> is mostly snow in the winter, and in the summer it is rain, with occasional snow. </span>
Answer:
1, 3 and 5 are true.
Explanation:
A smaller planet doesn't have the gravity to hold and atmosphere (with oxygen) or water. A larger earth would hold a thicker atmosphere, which would contain more ammonia and methane.
