First, we will solve for how long the spider takes to walk 1 full mile. Since we know that the spider walks 1/9 in 1 hour, we can divide.
9 * 1 = 9 hours to walk 1 mile
Second, we will solve for how long the spider takes to walk 8 miles.
9 * 8 = 72 hours to walk 8 miles.
Best of Luck!