11. Multiply.
Write your answer as a complex number in standard form.
12. Solve
where
is a real number.
Simplify your answer as much as possible.
13. Simplify.
Write your answer without parentheses.
Assume that the variable represents a positive real number.
14. Simplify the expression.
Write your answer without using negative exponents.
Assume that all variables are positive real numbers.
15. Suppose that an object is dropped from a height of
meters and hits the ground with a velocity of
meters per second. Then
If an object hits the ground with a velocity of
meters per
second, from what height was it dropped?
Carry your intermediate computations to at least four decimal places, and round your answer to the
nearest tenth.