Awoman weighing 500 n glides across some ice, starting her glide with a speed of 4.00 m/s. if the coefficient of friction between the skates and the ice is 0.115. how far does she go before coming to rest?

it can't.   acceleration is a change in velocity.

-- "declination zero" means the object is in the sky at some point directly over the earth's equator.  

-- if it's the sun and it appears to be over the equator, then that tells us that the earth's axis is not tilted toward or away from it.  

-- that in turn tells us that the earth is at one of the two equinoxes in its orbit, either the spring one or the autumn one. (d)

-- (the first days of summer and winter coincide with solstices, not equinoxes.)