To calculate the area of a circle, use the equation a=pir^2 or area=3.14*radius squared
Insert the known values. We need to find the radius of the circle. Since the radius is half of the diameter, divide the diameter by 2 to get the radius.
The diameter is 20.
20/2=10
Area=3.14*10 squared
Area=3.14*100
Area=314 cm
Hope this helps!
Answer:
The y-int represents the base price of $200 for airfare from NYC
The slope represents a cost of 30 cents per mile traveled
If the base cost for airfare changed to $50 and the cost per mile is unchanged, the new equation would be y=50+0.30x
If the cost per mile changed to 50 cents, the new equation would be y=200+0.50x
2,3,5,6 are all exterior angles because they are out of the triangle
Answer:
r = 
Step-by-step explanation:
Given
A = 4πr² ( divide both sides by 4π )
= r² ( take the square root of both sides )
= r
Answer:
100m
Step-by-step explanation:
x=the height of the tower
100m=the distance from the tower
45 degrees the angle of elevation
Drawing a diagram allows you to see that you can form a 'right-angled triangle'.
Using trig. :
Tan 45=x/100m
multiply both sides by 100m
100m*tan 45=100m
