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**URGENT Basic Calc Help needed**

Q3) If a car depreciates continuously at a rate of 23.5%, when ( years ) will a 25,000 dollar car be worth $12,000 ?

A= pe^rt

(12,000)/(25000)= e^(.235t)

Ln ( 12,000/25000)=.235t

T= .0038

This answer does not seem right. Where am I going wrong?

Q2) Find the vertical and horizontal Asymptotes of f(x) = (3x) / ( 2x-4)

Vertical Asymptote = 2

Horizontal Asymptote= dunno.. I cant use limits here directly since the exponents of X are the same. If i tried dividing them so as to get a proper form, it doesnt seem to work out.

Q3)

Find the equation of the normal line at x=2 of the function f(x) = x^2-5x+4

X=2

Y=-2 ( plugged in 2 into the function )

Y=mx+b

-2=2m+b

How would I find the slope and B? Is the slope -1?

Q4) Find the average rate of change between 2 and -1 of

f(x) = x^2+ 3x

I found the derivative to be 2x+3 and plugged in 2 and -1 into the derivative to get -2 and 10.

10=11/2 +b = 9/2 = b

Is this the answer? y= -11/4x + 9/2

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