1. The arc length is 5, which accounts for (1/3) of the circumference of the circle. A circle is 360 degrees, so the arc length corresponds to 360X (1/3) = 120 degrees
2. After the price increase, the value is 2000 1) Since the manufacturer wants to make 20, the purchase price is 100X(1 20)=120 yuan. (2) Since the retailer wants to make a profit of 10, it needs to add 10 to the purchase price, so the retail price is 120X(1 10)=132 yuan.
4. a:b=(1/2):(2/3)=3:4, b:c=2:5, you can set b=2, then c=5, the same principle a=3/2,
So a:b:c=3/2:2:5=3:4:10
5. Suppose the interest rate is a, then there are 1000 1000Xa It is 8a-3a=10, and a=2 is calculated. Therefore, there are 6 people in the science and technology team, 4 people in the calligraphy team, and 16 people in the painting team
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