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(#M40145307) EXAM QUESTION Keep an EYE

A radio active substance decays so that the amount A present at a time t (years) is A = A 0 e ^ -18t find the halflife (time for half to decay) of this substance. (in .5 = -0.69315

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(#M40145306) EXAM QUESTION Keep an EYE

An investor has $20,000 o invest. If part is invested at 8% and the rest at 12%, how much should be invested at each rate to yield 11% on the total amount invested?

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(#M40145305) EXAM QUESTION Keep an EYE

What is the result of (5^x)^y multiplied to [5^(3*y)]^z?

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(#M40145304) BOOK QUESTION Keep an EYE

Solve by completing the square:
x^2 + 6x - 8 = 0


Solve by using the quadratic formula:
z^2 -6z -14 = 0


Solve:
x^2 + 2x - 8

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(#M40145303) BOOK QUESTION Keep an EYE

How would you graph this equation?
y = 2x

TSJ

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(#M40145302) EXAM QUESTION Keep an EYE

The equatiopn of a circle is x^2 + y^2 = 50. the region enclosed by the circle is also divided into two parts. find the area of the smaller one.

thnx!

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(#M40145301) EXAM QUESTION Keep an EYE

A sales commission on a $12,500 car is $625. what is his rate of commission?

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(#M40145300) EXAM QUESTION Keep an EYE

(x-4)
______
(x/4)-(4/x)

that line makes it a fraction. please simplify this complex fraction. thanks.

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(#M40145299) EXAM QUESTION Keep an EYE

Can you please help me in simplifying this complex fraction?

x-3/x+3 + x+3/x-3
___________________

x-3/x+3 - x+3/x-3

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(#M40145298) EXAM QUESTION Keep an EYE

3X+2Y=5
-2X+3Y=27

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