Answer:
Number of tadpoles Chris has = 3
Number of tadpoles David has = 6
Number of tadpoles George has = 12
Step-by-step explanation:
Given: Total number of tadpoles divided among 3 friends = 21
Number of tadpoles Mark gave to Chris = A
Number of tadpoles Mark gave to David = B = 2A
Number of tadpoles Mark gave to George = C = 2B = 2(2A) = 4A
∴ Total number of tadpoles = A + B + C
⇒ 21 = A + 2A + 4A
⇒ 21 = 7A
⇒ A = 21 ÷ 7 = 3
∴ Number of tadpoles Chris has = A = 3
Number of tadpoles David has = B = 2A = 2(3) = 6
Number of tadpoles George has = C = 2B = 2(2A) = 4A = 4(3) = 12
Answer:
Use the "find vertically opposite angle" method.
a = 80°
To find the other angles:
Since the angles equal up to 360 which makes a full circle shape...
360 - 80 - 80 = 200 (B and C)
200 ÷ 2 = 100 (Angle for B and C since they are vertically opposite, hence having the same angle)
b = 100°
c = 100°
C=2πr
The C stands for circumference
the π is Pi (3.14)
and r is the radius (length of half a circle)
Since the sides are 10 ft you multiply that by 2 to get the length of both sides which gives you 20 feet.
Then to find the circle, since both are half circles. You can just do the normal circumference equation and you will end up with the same answer.
For example in this problem: this problem gives you the diameter but you need the radius of the circle. C=2(π)(1.5)
C=9.42 < this is the circumference of the circle.
Then you add the sides of the table which are 20 feet.
So the final answer is 29.42 feet.