The area of D is given by:

The average value of f over D is given by:
Answer:
1cm = 320 km?
Step-by-step explanation:
The formula for the circumference of a circle = 2 x radius x pi
The radius is given as 21 cm and pi = 3.142
Circumference = 2 x 21 x 3.142 = 131.964 cm
Answer:
from the working in the photo
Answer:
2
Step-by-step explanation:
The equation for a line is:
y=mx+b
Where m is the slope, b is the y-intercept, and x and y are the x and y coordinates.
The equation given to us is:
y=2x+3
Therefore 2 is the slope