- The layer inside Earth that creates Earth's magnetosphere is the -.??

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Net ionic equation of
Fe(NO3)3 + 3NaOH = Fe(OH)3 + 3Na + (NO3)3? Help w/ getting velocity of an object when I'm not given mass. Refer to picture linked below. Also, what does it mean when it says height? Can someone show me the steps to solving this,
.0001x^2+.07x-2=0? DERIVATIVE HELP PLEASE!
g(t)=sqrt((t)/(t+3))? The surface area of a pyramid is 88 square feet.
A.what is the surface area of a similar pyramid that is larger by a scale factor of 5?