To solve this problem you must apply the proccedure shown below:
1. You have the following function given in the problem above:
[tex]y=10^{3}-12x[/tex]
2. To estimate the value of [tex]y[/tex] when [tex]x=3[/tex], you only need to substitute this value of [tex]x[/tex] into the function, as following:
[tex]y=10^{3}-12x\\y=10(3)^{3}-12(3)\\y=10(27)-36\\y=270-36\\y=234[/tex]
Therefore, the answer is: A) 234
