Perform the indicated operation. Write your result in scientific notation.(6.8 × 105)(3.2 x 106)
A. 2.176 × 1012
B. 2.176 × 1030
C. 2.2 × 10-12
D. 2.176 × 105
Answer: A
Mathematics
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Change the complex number to rectangular form.5 cos 300°
A. 2.5 - 4.33j B. 4.33 + 2.5j C. -4.33 + 2.5j D. 2.5 + 4.33j
Mathematics
Solve. Write the answer in simplest form.Find the perimeter of the scalene triangle, a triangle with all three sides a different length. Recall that the perimeter of a figure is the distance around a figure.
A. 
km
B. 
km
C. 
km
D. 
km
Mathematics
Solve by completing the square to obtain exact solutions.x2 + 16x + 54 = 0
A. -8 ± 
B. 8 ± 3
,
C. 8 + 
D. -16 ± 3
Mathematics
Use the reference angle to find the exact value of the expression. Do not use a calculator.sec 
A. -
B. -2
C. - 
D. 
Mathematics