I need help with questions 3 and 4. For #3, I solved everything except the explicit expression. I don't understand #4 at all. It doesn't seem to be linear, exponential, or quadratic. For #3, I got f(x)=2x+4 as the explicit expression. This however only solves for the first common difference. I would appreciate help solving this.

For #4, I had no clue what to do, so I put random stuff. I would appreciate help fixing it.

Thanks!

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step-by-step explanation:

the answer is 1030 it's very simple math.

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation:

step-by-step explanation: