Answer:
D. About 800 years
Step-by-step explanation:
Use the half-life equation:
A = A₀ (½)ⁿ
where A is the final amount,
A₀ is the initial amount,
and n is the number of half-lives.
0.90A₀ = A₀ (½)ⁿ
0.90 = (½)ⁿ
To solve for n, take log of both sides:
log 0.9 = n log 0.5
n = (log 0.9) / (log 0.5)
n = 0.152
It takes 0.152 half-lives. The half-life of carbon-14 is 5730 years.
0.152 × 5730 years = 871 years
The closest answer is D.
Answer:
midpoint m= <u>(</u><u>x1 </u><u>+</u><u>x2</u> , <u>y1 </u><u>+</u><u> </u><u>y2</u><u>)</u>
2. 2
Step-by-step explanation:
M =(<u>0</u><u>+</u><u>2</u><u>. </u>, <u>0</u><u>+</u><u>2</u><u>)</u>
2. 2
M=(1,1)
Answer:
two and one fourths plus eight thirds
Step-by-step explanation:
Black 20% 1/5
navy 25% 1/4
Brown 35% 7/20
other 20% 1/5
hope it helps!!
