12. Solve the following expression. 18 + 12.4 x 1/10
Answer: A
19.24
The expression 18 + 12.4 x 1/10 evaluates to 19.24. First, calculate 12.4 x 1/10, which equals 1.24, and then add this result to 18.
A) 19.24
This option is correct as it accurately represents the result of the expression. Performing the calculation gives 18 + 1.24, which equals 19.24.
B) 0.304
This option is incorrect. The result 0.304 does not relate to the operations involved in the expression, as it appears to be a miscalculation or misunderstanding of the expression.
C) 1.124
This option is also incorrect. The value 1.124 does not result from the expression provided; rather, it seems to misinterpret the multiplication or addition in the equation.
D) 304
This option is incorrect. The value 304 is significantly larger than the result of the expression, indicating a misunderstanding of the arithmetic involved, as the maximum result obtainable is much lower.
Conclusion
The correct answer, 19.24, arises from accurately calculating the expression step by step. The other options fail to reflect proper arithmetic operations or misinterpret the components of the expression, confirming that they are not valid answers.