Chapter 8 linear appliCaTionS 239
- The salary is $410, so S = 200 + 0.10s becomes 410 = 200 + 0.10s.
410 200 010
200 200
210 010
210
010
2100
=+
−−
=
=
=
.
.
.
s
s
s
s
The week’s sales level was $2100.
- The volume is 1140 cubic inches, so V = 120h becomes 1140 = 120h.
1140 120
1140
120
95
=
=
=
h
h
. h
The box needs to be 9.5 inches tall.
- The volume is 25.088o cm^3 , so V = 7.84oh becomes 25.088o = 7.84oh.
25 088 784
25 088
784
32
..
.
.
.
oo
o
o
=
=
=
h
h
h
The height of the cylinder needs to be 3.2 cm.
6.^59 ()F – 32 represents degrees Celsius, and 2F represents twice degrees
Fahrenheit. We want these two quantities to be equal.
95 (F−=^32 )^2 F