Solve the problem.7 times the square root of some number is equal to 21. Find the number.

A. 14
B. 6
C. 3
D. 9


Answer: D

Mathematics

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Sketch the graph of the polar equation. Identify the curve.r = 4 sin(2?)

A. lemniscate

B. rose curve

C. rose curve

D. circle

Mathematics

Evaluate the radical expression if it is a real number. Use a calculator to approximate irrational numbers to the nearest hundredth. If the expression is not a real number, so state.

A. 12 B. 36 C. 3 D. not a real number

Mathematics

Find the average.$27.61, $59.28, $45.15,    

A. $42.00 B. $27.61 C. $35.00 D. $45.15

Mathematics

Given that , it follows that .

Answer the following statement true (T) or false (F)

Mathematics