D
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Answer:
The right answer is C ( π/2)
Answer:50
Step-by-step explanation:
Multiply both numbers to get answer
To evaluate an expression with a given variable means to replace the number in the place of the variable, and then solve to find what the expression equals.
Example would be: x + 3 and x = 4
x + 3
4+3 = 7
7 is the value of the expression now.