Find the numerical value of the expression for the given value.
, x = 3
A. - 
B. 
C. 
D. - 
Answer: B
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Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.4-3 ? 4
A. 64
B. 
C. 16
D. 
Perform the indicated operation. Write the result in the form a + bi.(6 + 4i) - (-3 + i)
A. 9 + 3i B. 9 - 3i C. -9 - 3i D. 3 + 5i
The volume of a right circular cone of radius r and height h is 
Suppose that the radius and height of the cone are changing with respect to time t.
a. Find a relationship between 
b. At a certain instant of time, the radius and height of the cone are 12 in. and 13 in. and are increasing at the rate of 0.2 in./sec and 0.5 in./sec, respectively. How fast is the volume of the cone increasing?
Find the special product.(x + 9)2
A. x2 + 81 B. 81x2 + 18x + 81 C. x + 81 D. x2 + 18x + 81