Answer:
sin(-pi/2) = -1
Step-by-step explanation:
sin (pi/12) cos((7pi)/12) -cos (pi/12) sin((7pi)/12) = -1
cos(-pi/2) = 0
sin(-pi/2) = -1
cos((2pi)/3) = -1/2
sin((2pi)/3) = (√3)/2
what do we need to know:
the radius of the semi circles;
the area of:
purple region = area of a circle = pi * r^2;
green region = base * height;
what we know:
the base, 28m;
what the sum of the two diameters is, 28;
the length of a single diameter, 14;
what we can assume:
the two semi-circles are equal, as otherwise i cannot see a way to answer this;
the radius of the two semi-circles, 7m as the two diameters = 28, & d/2 = r
what does that mean:
the height is 17m
green region area = 476 m^2
purple region area is = 153.96 m^2
Answer:
That is the third one ：
456.222
because it has the most numbers 4,5,6 and point . 2,2,2
Answer:
- 3
- 7
- 7
Step-by-step explanation:
1. In 2 draws, you can get one of each, so a minimum of 3 draws will guarantee at least 2 of one color.
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2. A minimum of 3 socks must be drawn to ensure one pair. A minimum of 2 must be drawn to ensure an additional pair. For three pairs, 7 socks must be drawn.
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3. The first 5 balls drawn could be white, so an additional 2 must be drawn to ensure 2 red balls. To be sure of 2 red balls, 7 balls must be drawn.
