Write the complex number in rectangular form.9(cos 180° + i sin 180°)
A. -9i
B. 9
C. 9i
D. -9
Answer: D
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Answer the problem with a sentence containing the requested unit of measure. Write improper fractions as mixed numbers for U.S. measures and as decimals for metric measures.A rectangular playground is 26 meters wide. Express this number in yards.
A. A rectangular playground is 28
yards wide.
B. A rectangular playground is 16
yards wide.
C. A rectangular playground is 41
yards wide.
D. A rectangular playground is 23
yards wide.
Provide an appropriate response.Why is scientific notation used?
What will be an ideal response?
Use the Euler diagram to determine if the given argument is valid.
 figure 1.png)
Solve the problem.Find the break-even point for the given 
and 
functions. Round to the nearest whole unit.C(x) = 20x + 266,000R(x) = 100x
A. 3325 B. 80 C. 120 D. 2217