Answer:

Step-by-step explanation:
Given
Area of Sector : Area of Circle = 3 : 5
Required
Determine the central angle
The question implies that

Multiply both sides by 5


Multiply both sides by Area{circle}


Substitute the areas of sector and circle with their respective formulas;


So, we have

Divide both sides by 


Multiply both sides by 360


Divide both sides by 5




Hence, the central angle is 216 degrees
Answer:
$7.76
Step-by-step explanation:
So you can express the price in the slope-intercept form: y=mx+b where m is the slope, but in this context it's the price per km, and b is the y-intercept, but in this context it's the base price (how much it costs even if the length is 0 km)
So it gives you the slope of $0.22 per km. so you now have the equation
y = 0.22x + b
To find the base amount or y-intercept, you can take some of the given points, the price will be y, and the length will be x.
I'll use the point (6, 4.68)
Plugging these values into the equation you get:
4.68 = 0.22(6) + b
multiply

subtract 1.32 from both sides

So now we have the full equation:
y = 0.22x + 3.36
Now to find the price if the length is 20km, simply plug in 20 as x
y = 0.22(20) + 3.36
Multiply
y = 4.4 + 3.36
Add
y=7.76
Answer:
5/8 chance
Step-by-step explanation:
Numbers: 1,2,3,4,5,6,7&8
Even numbers:2,4,6,8 (4/8 chance)
Number that is 7: 7 (1/8 chance)
And = ×
Or = +
7 OR an eve number
1/8 + 4/8
5/8 chance
10, 35 & 40 are all multiples of five
Answer:81
Step-by-step explanation:
(81^2)^(1/2)=81^(2x1/2)
81^(2/2)
81^1=81