Multiply and write the result in standard form.2i(9 - 7i)
A. 14 + 18i
B. 18i - 14i2
C. 18i - 14
D. 18i + 14i2
Answer: A
Mathematics
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Provide an appropriate response.Consider the following annuity: $2000 due at the end of each year for two years, and $3000 due thereafter at the end of each year for three years. At an interest rate of 4% compounded annually, the present value of the annuity is
A. $9,583.28. B. $12,487.24. C. $10,211.37. D. $11,469.37. E. $10,541.31.
Mathematics
Prove the identity.ln |sec x| = -ln |cos x|
What will be an ideal response?
Mathematics
Convert to trigonometric notation and perform the indicated operation.(6
- 6i)(2i)
A. 12
i
B. 12
+ 12i
C. 1 + 
i
D. 12 + 12
i
Mathematics
Perform the indicated matrix operations.Let B = 
. Find -3B.
A. 
B. 
C. 
D. 
Mathematics