Write the expression in the standard form a + bi.If z = 7 - 3i, evaluate z + 
.
A. 14 - 6i
B. 14 + 6i
C. 14
D. -6i
Answer: C
Mathematics
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Round off the approximate number as indicated.2090 2 significant digits
A. 2000 B. 2100 C. 290 D. 2200
Mathematics
Multiply or divide and simplify your answer.2 ? 8
A. 16
B. 16
C. 10
D. 16
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.ln 
A. 8 ln y + 8
B. 
ln 
+ 
C. 
ln y + 
D. 
Mathematics
Use the change-of-base formula and a calculator to evaluate each logarithm.log7 64.75
A. 2.1432 B. 0.4666 C. 1.8112 D. 9.2500
Mathematics