Given:
Radius of a circle = 21 m
Area of a sector of the circle = 27.72 m²
To find:
The angle at the center of the circle.
Solution:
The area of a second is:
Where, r is the radius of the circle and 
is the central angle.
Putting 
in the above formula, we get
Therefore, the central angle of the sector is 
.
Answer:
219/16
Step-by-step explanation:
Multiply both numerator and denominator by 2.
4*2 = 8 & 5*2 = 10
4/5 is thus equal to 8/10 or eight-tenths.
With a bar duagram, just divide/split it up evenly into 5 parts then colour in 4 of the pieces. Then, divide as a whole now make it so there's 10 parts - do this by splitting each 5 parts into 2 (put line through middle) to make 10 parts. Now you will see that there is 8 parts that are coloured in for 10 pieces compared to 4 coloured parts when there was 5 pieces.
Answer:
2/9
Step-by-step explanation:
1/3 is equavalent to 3/9 which you can add 2/9 to make it 5/9
Answer:
equation: y = 50x + 75
The gift certificate will pay for the cost of 7 lessons and will have $40 left on it.
Step-by-step explanation:
