Question Progress Homework Progress
13/20 Marks
師
80%
Work out the circumference of this circle.
Take it to be 3.142 and give your answer to 1 decimal place.
9m

C = 28.278  m

Step-by-step explanation:

The attached figure shows a circle whose diameter is 9 m.

Radius = Diameter/2

r = 9/2 = 4.5 m

The circumferance of the circle is given by :

C = 2πr

Put r = 4.5 m in the above formula

C = 2 × 3.142 × 4.5

= 28.278  m

So, the circumference of this circle is 28.278  m.

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1