PLEASE HELP QUICK
How does wind form?

Differences in the density of seawater produce wind.

Ocean currents produce wind above them.

Warm air moving from the equator toward the poles produces wind.

Differences in atmospheric pressure produce wind.

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Any tips for studying for middle school

D/dx(1+x^4+x^6/x^2+x+1) a)2x-1 b)2x+1 c)2 d)0