Page 106 - Algebra

a) y = 2x b) y = 3x
c) y = 4x d) y = 2(3)x e) y = 1.5(1.5)x
4. In 2010, a wildlife sanctuary of a city brought 160 extinct animals that were killed in poaching. By 2013, the number of extinct animals grew to 540. If the population of the animals grew exponentially, find the equation of their growth.
a) y =540 (1.5)x b) y =16 (1.5)x c) y =1.5x d) y =160 (1.5)x e) Cannot be determined
5. Radioactive material decays at 14% per day. If you’re given 200 grams of the material, how much material will decay approximately in 5 days? Use (0.86)5 = 0.47
a) 94 grams b) 96 grams c) 97 grams d) 98 grams e) Cannot be determined
6. A bank offers an investment scheme offering 2 years of deposit at a rate of 12% compounded annually. If Alex invested $2000 in the scheme, how much money will he get after two years?
a) $1548.80 b) $1848.80 c) $2400 d) $2500
e) $2508.80
Page 105 of 177
Algebra I & II