An old lady taking her elephant for a walk beside the river was dismayed to see it
falling over the steep, slippery bank towards
the water. Luckily it was harnessed to a
strong rope, and the lady managed to take
several complete turns of the rope around a
tree and hold on tightly enough to keep it
from the waiting crocodiles.
Each turn of the rope around the tree reduced the pull by 70%. Given that
the old lady, who is really quite strong, can support a weight of at most
50kg, while her elephant weighs 1 tonne, find the smallest number of
complete turns which the old lady could have used.
If she had used half a turn less could she still have held the elephant?

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.)