Answer:
1. 
= 3.143
2. Circumference
3. Area of the circle is 3850 
.
ii. Circumference of the circle is 220 cm.
Step-by-step explanation:
The area, A, and the circumference, c, of a circle can be determined respectively by:
A = 
C = 2r
where r is the radius of the circle.
1. the ratio of the circumference and diameter, D, of a circle is:
r = 
so that,
C = 2
C = D
=
= 
= 3.143
2. The distance around a circular region is known as it's circumference.
3. Given a circle of radius 35 cm, then:
A =
= x 
= x 1225
= 22 x 175
A = 3850
Area of the circle is 3850 .
C = 2r
= 2 x x 35
= 2 x 22 x 5
= 220
C = 220 cm
Circumference of the circle is 220 cm.
Divide both sides by 2
x^2 = 128/2
Simplify 128/2 to 64
x^2 = 64
Take the square root of both sides;
x = √64
Since 8 * 8 = 64, the square root of 64 is 8
<em>x = -8 and 8</em>
<u>Answer: B -8 and 8</u>
<h2>1) B</h2>
<h2>2) C</h2>
<h2>3) A</h2>
<h3>do you need an explanation?</h3>
The correlation calculation only works well for relationships that follow a straight line.
Therefore in this case, the trend is not linear.So there is no correlation.
c. There is almost no relationship between x and y.<span />
Answer:
Look for a pair of factors of
24
whose difference is
5 . 24
= 8 × 3 and 5 = 8 − 3 So x 2 + 5 x − 24 = x 2 + ( 8 − 3
) x −
(
8
×
3
) = (
x + 8
) (
x − 3
)
So the solutions of x 2 + 5
x −
24
=
0 are x = −
8 and x = 3
Step-by-step explanation:
