3×9
n+1
−9×3
2n
=
3×3
2n+3
−(3
2
)
n+1
3×(3
2
)
n+1
−3
2
×3
2n
=
3
1+2n+3
−3
2n+2
3
1+2n+2
−3
2+2n
=
3
4+2n
−3
2n+2
3
3+2n
−3
2+2n
=
3
2n
(3
4
−3
2
)
3
2n
(3
3
−3
2
)
=
81−9
27−9
=
72
18
=
4
1
8(40)(2) = 640 labor cost
640/2000 = .32 * 100 = 32%
Labor cost is 32% of revenue
4r/s - 3r/s = (4r-3r)/s = r/s Answer
Answer:
B,C, and E
Step-by-step explanation:
Multiply the stuff inside by the numbers outside
