Q.The above model describes the exponential decay of chemical element. t is the time in years, Q(0) is the initial amount of the chemical element, Q(t) is the amount of chemical element after t years and p is a constant. It is known that every 1600 years the amount of the chemical element drops to half ( its half-life is 1600 years). If the term e^p in the above equation can be replaced by the term x^y, where both x,y rational numbers, what is x and y?

(a) x=\sqrt{\frac{1}{2}}, y=\frac{1}{1600}

(b) x=\frac{1}{2}, y=\frac{1600}{3}

Q What is the range of h(x)=3 ln (x) -7? (a) (-8,8) (b) (3,8) (c) (-7,8) (d)(-8, -7)