Let's find the product of the given numbers step-by-step.
### Part (a): [tex]\((-9) \times 8 \times 11\)[/tex]
1. First, multiply [tex]\(-9\)[/tex] and [tex]\(8\)[/tex]:
[tex]\[
-9 \times 8 = -72
\][/tex]
2. Next, multiply the result by [tex]\(11\)[/tex]:
[tex]\[
-72 \times 11 = -792
\][/tex]
So, [tex]\((-9) \times 8 \times 11 = -792\)[/tex].
### Part (b): [tex]\(11 \times 12 \times (-13)\)[/tex]
1. First, multiply [tex]\(11\)[/tex] and [tex]\(12\)[/tex]:
[tex]\[
11 \times 12 = 132
\][/tex]
2. Next, multiply the result by [tex]\(-13\)[/tex]:
[tex]\[
132 \times (-13) = -1716
\][/tex]
So, [tex]\(11 \times 12 \times (-13) = -1716\)[/tex].
### Part (c): [tex]\((-8) \times 7 \times (-3)\)[/tex]
1. First, multiply [tex]\(-8\)[/tex] and [tex]\(7\)[/tex]:
[tex]\[
-8 \times 7 = -56
\][/tex]
2. Next, multiply the result by [tex]\(-3\)[/tex]:
[tex]\[
-56 \times (-3) = 168
\][/tex]
So, [tex]\((-8) \times 7 \times (-3) = 168\)[/tex].
### Summary
Here are the results for each part:
(a) [tex]\((-9) \times 8 \times 11 = -792\)[/tex]
(b) [tex]\(11 \times 12 \times (-13) = -1716\)[/tex]
(c) [tex]\((-8) \times 7 \times (-3) = 168\)[/tex]
