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If α+β are the roots of the equation 3x^2-5x+6=0. Find the value of α/β+β/α

If 5 teachers can mark 450 scripts in 5 days, how many scripts will 20 teachers mark in 8 days?

4.The profit function and the average cost function for a product of a company are

**p(***x***) = - 4000 + 194***x*** - 0.149***x*^{2}** **in ringgit and ________ **4000**

** C(x) = 6 - 0.001x + **^{________}** **

^{ x}

ringgit respectively, when **x** is the quantity sold in units. Find

(a) the total cost function

(b) the revenue function

(c) the quantity which will maximize the profit

(d) the maximum profit

(e) the price at maximum profit

Integrate the following

A) 3x + 21x^{2}

B) x^{3}-1

∫^{3}_{2} -------- dx

x^{2}

1. Use the first principal to differentiate the following with respect to x

f(x) = 3x^{2}**- **4x + 7