3 half lives = 3x 5730 years = 17190 years
Answer:
glass or plastic containers and sealed plastic bags
Answer:
1. x = 7.25
2. x = 36
Explanation:
1. Base on intersecting secants theorem, therefore:
DE × DF = DG × DH
DE = 11
DF = 11 + 10 = 21
DG = 12
DH = 12 + x
Therefore,
11*21 = 12(12 + x)
231 = 144 + 12x
231 - 144 = 12x
87 = 12x
Divide both sides by 12
x = 7.25
2. Based on the secant-tangent rule, we have:
CD*CA = CB²
CD = 12
CA = 12 + x
CB = 24
Thus:
12(12 + x) = 24²
144 + 12x = 576
12x = 576 - 144
12x = 432
Divide both sides by 12
x = 432/12
x = 36
<span>The answer is letter C.
Plates move in different directions because the magma moves in “cells” which circulate in different directions. The intense heat of the Earth’s core causes molten rock in the mantle layer to move in a pattern called convection cell. When this occurs warm material rises, cools, and eventually sinks down, as this happens, it is again warmed and it rises again.
Plates help themselves move instead of just surfing along the mantle because of giant convection cells that change the structure of rocks through heat.<span>
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