book Maths Puzzle Numerical Ability

What is the equation in standard form of the ellipse that has a center(-1,4), foci at (-1,8) and (-1,0), and the length of the minor axis is the sq. root of 3?

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book Other Question

1. How do you factor out x^3?

2. How do you factor out (sqrt x+5)-3/x-4?

PLEASE HELP!!!!!! Two years after an expansion, a company had sales of $42,000. Four years later the sales were $102,000. Assuming that the sales in dollars S and the time in years t are related by a linear equation, find the equation relating S and t.