Formula for finding circumference of a circle is 2πr.
Step-by-step explanation:
- The given question says what is the circumference of a circle that is 9cm.
- As radius is required for finding circumference of a circle, the formula is 2πr.
- Therefore taking the formula and substituting radius (r)= 9 cm. We get 2πr as 2×π×9 = 18π cm OR
- If we substitute the value of π as 3.14 we will get⇒ 2×3.14×9= 56.52 cm.
- So the circumference of the given circle would be 18π or 56.52 cms.
Answer:
3.69 C.
Step-by-step explanation:
if u use the calculator it will have a lot of numbers but to the nearest hundreth it is 68 rounded is 69
You didn’t finish the question but this is the equation:
x = number of years;
1160 + 22x (post falls)
1900 - 15x (Richmond)
Answer:
cat bird train elephant
Step-by-step explanation:
You can use the identity 
to write the equation as
Now, from the fundamental equation of trigonometry, deduce an expression for 
in terms of 
:
The equation becomes
Simplify the left hand side and move all terms to left hand side:
Now, if you let 
, this equation becomes a quadratic equation:
The two solutions of this equations are
We must be careful, because we have to remember that 
was actually 
. This means that can only assume values between -1 and 1. The second solution exceeds 1, so we reject it. So, we have
