Multiply. Write the result in the form a + bi. ? 

A. -15
B. 15i2
C. -15i
D. 15

Answer: A

Mathematics

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Solve.The formula for converting from Celsius temperature to Fahrenheit temperature is TF = TC + 32, where TC is the temperature in degrees Celsius. (i) Solve the formula for TC. (ii) Find the corresponding Celsius temperature for a temperature of 161°F. Round to the nearest tenth, if necessary.

A. (i) TC = (TF - 32)
(ii) 232.2°C
B. (i) TC = TF - 32
(ii) 321.8°C
C. (i) TC = TF - 32
(ii) 85.9°C
D. (i) TC = (TF - 32)
(ii) 71.7°C

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Mathematics

Solve using the addition principle.-20 = m - 14

A. -6  B. 6  C. 34 D. -34 

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Mathematics

Find the exact value of the logarithmic expression.log3 9

A. 9 B. 3 C. 6 D. 2

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Mathematics

Solve.You park your car in a pay lot. Because you have a coupon, you get the first  You pay for an extra 4 hr. How long can you park?

A. 9 hr B. 8 hr 15 min C. 9 hr 15 min D. 8 hr 75 min

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Mathematics