The equation of the circle:

where:
(a; b) - coordinates of the center
r - a radius
Use:

We have:
Answer:The center: (-2; 4)The radius: r = 4
Answer: Distance traveled divided by rate provides the rate of change in position in time. For example, if Cole traveled 225 km at 45 km per hour and traveled 45/225 = 5 hours, then the rate of change in position was 30/5 = 20 minutes.
Step-by-step explanation:
Answer:
8.4 meters of ribbon left and 14 wreaths made
Step-by-step explanation:
9 * 0.4 = 3.6 meters used for presents
12 - 3.6 = 8.4 meters left for wreaths
8.4 / 0.6 = 14 wreaths
Pythagorean theorem a^2+b^2=c^2