An Apollonian gasket is formed by the following steps:

Step 1: Draw three circles that are tangent to each other, forming one triangle with curved sides, as shown in the figure.

Step 2: Draw a circle that is tangent to the three circles, forming three triangles with curved sides.

Step 3: Draw three circles, making each one tangent to the new circle and to two of the original circles, forming nine triangles with curved sides.

Continue the steps by drawing circles that are tangent to three circles and form three triangles with curved sides.

How many curved triangles are in the ninth iteration?

Suppose that a customer is purchasing a car. he conducts an experiment in which he puts 10 gallons of gas in the car and drives it until it runs out of gas. he conducts this experiment 15 times on each car and records the number of miles driven. full data set car 1 238238 216216 205205 212212 240240 274274 297297 252252 260260 247247 257257 243243 296296 243243 290290 car 2 245245 204204 215215 209209 251251 165165 221221 295295 172172 287287 268268 305305 320320 260260 297297 describe each data set, that is determine the shape, center, and spread. sample mean for car 1 x overbar equalsx=216216 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.) sample mean for car 2 x overbar equalsx=209209 mi / 10 gal (type an integer or decimal rounded to one decimal place as needed.)