HEYOOO PEEPS Tiana is participating in a triathlon and you need to calculate her average speed for all three events. She skates 20km in 1.25 hrs. She paddles a kayak 1km in 0.75 hrs. and she Rides her bike 100kmn in 2 hrs.

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the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.