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College Algebra & Trigonometry, 2018a

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11.4. APPLICATIONS 519<br />

Section 3.3<br />

1) ≈ 2.322 3) ≈ 1.771 5) ≈ 1.585 7) ≈ 1.227<br />

9) ≈−0.089 11) ≈ 0.183 13) ≈−2.297 15) ≈−19.655<br />

17) ≈ 0.723 19) ≈−0.795 21) ≈ 2.117 23) ≈ 0.042<br />

25) ≈−1.165 27) ≈ 0.134<br />

Section 3.4<br />

1) x =1.8 3) x =12 5) x =9, −1<br />

7) x =6 9) x =2, −4 11) x = 16<br />

7<br />

13) x ≈ 1.606, −5.606 15) x =1.2 17) x =24<br />

19) x = 8 3<br />

21) x =3, 8 23) x =1<br />

25) x ≈ 11.944, −5.944<br />

Section 3.5<br />

1) a) ≈ 1.576g b) ≈ 69.67 years 3) 50mg<br />

5) a) 210 ◦ F b) ≈ 152.9 ◦ F c) ≈ 28.4 minutes<br />

7) 7:30AM 9) a) T =20+80e −0.025t b) ≈ 62.85 ◦ C

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