Write the number in standard form.7 
A. 7i
B. -7i
C. -7
D. 7
Answer: A
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Solve the problem.If a given set has nine elements, how many of its subsets have at least five elements?
A. 255 subsets B. 256 subsets C. 32 subsets D. 130 subsets
Classify the angle as acute, right, obtuse, or straight.
A. Obtuse B. Acute C. Right D. Straight
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.If the distance from the earth to the sun were 84,000,000 miles. How long would it take a rocket, traveling at 2.4 × 103 miles per hour, to reach the sun? (Round to three places)
A. 3.5 × 104 hr B. 3.5 hr C. 3.5 × 102 hr D. 3.5 × 103 hr
Multiply. Write the result in the form a + bi.(6 + 
) (3 + 
)
A. 4 - 9
i
B. (18 - 
)+ (6
+ 3 
)i
C. 32 + 126i
D. (18 + 
)- 32i