The Lisbon's new heat pump cost $4,500. They bought it to replace their old furnace and air conditioner which cost about $2,800 a year to run. The heat pump will save them approximately 39% a year. In how many years will the heat pump pay for itself? Round to the nearest tenth.
What will be an ideal response?
4.1 years; 2,800 ´ 0.39 = 1,092; 4,500 ÷ 1,092 
4.1
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Express the integrand as a sum of partial fractions and evaluate the integral.
A. 1.34 B. -0.67 C. 0.67 D. 1.09
Given the polynomial function f(x), find the rational zeros, then the other zeros (that is, solve the equation 
), and factor f(x) into linear factors.f(x) = x3 + 4x2 - 2x - 8
A. -
, multiplicity 2; -2; f(x) = (x + 
) 2(x + 2)
B. -
, multiplicity 2; -
, multiplicity 2; f(x) = (x + 
) 2(x + 
)2
C. -4, -2, 2; f(x) = (x + 4)(x + 2)(x - 2)
D. -4, -
, 
; f(x) = (x + 4)(x + 
)(x - 
)
Find ? for 0° ? ? < 360°.sin ? = -0.0869
A. -3.99°, 184.99° B. 94.99°, 364.99° C. 355.01°, 175.01° D. 355.01°, 184.99°
Use the tables below to solve the problem. Round dollar amounts to the nearest cent and percents to the nearest tenth.
You decide to work part-time at a local supermarket. The job pays $8.50 per hour and you work 21 hours per week. Your employer withholds 10% of your gross pay for federal taxes, 7.65% for FICA taxes, and 
for state taxes.(a) What is your weekly gross pay?(b) How much is withheld per week for
federal taxes?(c) How much is withheld per week for FICA taxes?(d) How much is withheld per week for state taxes?(e) What is your weekly net pay?
percentage of your gross pay is withheld for taxes?
A. (a) $178.50
(b) $1785.00
(c) $13.66
(d) $714.00
(e) $146.99
(f) 1407.7%
B. (a) $178.50
(b) $17.85
(c) $13.66
(d) $7.14
(e) $139.85
(f) 21.7%
C. (a) $217.15
(b) $17.85
(c) $13.66
(d) $7.14
(e) $17.85
(f) 21.7%
D. (a) $217.15
(b) $7.14
(c) $13.66
(d) $17.85
(e) $178.50
(f) 0.2%