When trains travel at high speed the air resistance (R varies as the square of the speed (V km/h). (aIf the air resistance is 8100 newtons when the speed is 60 km/h find , in the form of an equation , the relation between Rand V.

answer: haha (: i’ll go see what it is

step-by-step explanation:

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

2x^2+5x+17

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answer: d.) the total number of protons and neutrons is 15

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