Convert the polar representation of this complex number into its rectangular form:
z = 4(cos pi/2 + i sin pi/2)

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What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?