Mickey Mouse has a collection of 1,100 pennies. Of these pennies, 25% are dated before 1980, 35% are dated from 1980 to 2000, and the rest are dated after 2000. How many pennies in Mickey Mouse's collection are dated after 2000?

440 Pennies (are dated after 2000)

Step-by-step explanation:

25% + 35% = 60% (Pennies dated before 2000)

1,100 x 0.4 = 440

(1,100: The number of items)

(0.4: 40% in its decimal form)

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step-by-step explanation:

sin(7pi/6 - pi/3)  

= sin(7pi/6 - 2pi/6)  

= sin(5pi/6)  

= sin(pi - pi/6)  

= sin(pi/6)  

= 1/2  

sin 7pi/6 - sin pi/3  

= sin (pi + pi/6) - sin pi/3  

= -sin pi/6 - sin pi/3  

= -1/2 - sqrt(3)/2  

= -(1+sqrt(3))2