Mr. Wong wants to purchase 12 new smoke detectors for his house. Store A sells each smoke detector for $17 and Store B sells each smoke detector for $24. If Mr. Wong purchases all his smoke detectors
at Store A, how much less will he spend than if he purchased all the smoke detectors at Store B?
A. $84
B. $120
C. $72
D. $204

A-84

Step-by-step explanation:

12*17=204

12*24=288

288-204=84

a. -0.3 > -0.33

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2