Answer:
117.00
Step-by-step explanation:
I = prt  where i is the interest , p is the principal r is the rate and t is the time in years
2 years 6 months is 2.5 years
I = 1200 * .039* 2.5
I =117
 
        
             
        
        
        
Cot x = cos x / sin x = 0.85 / 0.52 =  1.6346
        
             
        
        
        
Answer:  6i) 6a² - 2ab
                6ii) -2b³
                6iii) b³ + 7b² - 49b
<u>Step-by-step explanation:</u>
6i)   (a + b)(5a - 3b)             +    (a - 3b)(a - b)
=    5a² - 3ab + 5ab - 3b²   +    a² - ab - 3ab + 3b²
=    5a² + 2ab - 3b²             +   a² - 4ab + 3b²
= 6a² - 2ab
6ii)    (a - b)(a² + b² + ab)              -  (a + b)(a² + b² - ab)
=   a³ + ab² + a²b - ab² - a²b - b³ -  (a³ + ab² - a²b -ab² + a²b + b³)
=   a³ - b³                                      -  (a³ + b³)
=   a³ - b³                                      - a³ - b³
= -2b³
6iii) (b² - 49)(b + 7)             +     343
=     b³ + 7b² - 49b - 343    +    343
=     b³ + 7b² - 49b
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Answer:
unbiased
Step-by-step explanation:
it would be biased if you lets say survey the history club kids