The answer is for the formula
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:
The height of the jumping hill x = 189.3 m
Step-by-step explanation:
From Δ ABC
AB = x = height of the hill
∠A = 36° , ∠B = 90°
Thus ∠C = 180 - ∠A - ∠B
⇒ ∠C = 180 - 36 - 90
⇒ ∠C = 54°
From Δ ABC
x = 0.809 × 234
x = 189.3 m
This is the height of the jumping hill.
Answer:
A
Step-by-step explanation:
take the black triangle's point A, move that towards the red triangle's point A'. It's 4 units left, 3 up
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Answer:
The answer is 13.
Step-by-step explanation:
Nearest whole number means <em>r</em><em>o</em><em>u</em><em>n</em><em>d</em><em> </em><em>o</em><em>f</em><em>f</em><em> </em><em>a</em><em>t</em><em> </em><em>"</em><em>Ones</em><em>"</em><em> </em>place<em> </em>:
e.g
1.59
≈ 2
3.1
≈ 3
