Answer:
A. 2.8 billion years old
Step-by-step explanation:
1/16 = (1/2)^4, so 4 half-lives have elapsed.
4 · 0.700 billion years = 2.8 billion years
The rock is 2.8 billion years old.
Answer:
x = 3
width = 15
Step-by-step explanation:
perimeter of a rectangle = 2 * width + 2 * length
54 = 2 * width + 2 * length = 2 * (4x) + 2*(5x) = 8x + 10x + 18x
54 = 18x
divide both sides by 18 to isolate x
x = 3
width = 5x = 5 * 3 = 15
Answer: homogeneous
Step-by-step explanation:
Answer:
its a i think
Step-by-step explanation: