book Maths Puzzle Numerical Ability

The access ramp to an expressway is 850 feet long. The measure of the angle of elevation is 4 degrees.About how long is the expressway from the horizontal at the beginning of the ramp?

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book Other Question

when the sum of 3.0 and 5.0 is subtracted from the product of 3.0 and 5.0, what is the difference?(the answers are....23.0, 20.0, 7.0, or none of these) Please could somebody help with this?
Where the line of y=2*x+4 crosses the curve of y=x^2+4*x+3.How do you find the
exact coordinates of these points besides reading it off graph?
Thank You