For #10-17: Elephants have the longest pregnancy of all mammals. One species of elephant has a mean gestation period of 525 days and standard deviation of 32 days. Pregnancy length follows an approximately normally distribution. Use the 68%-95%-99.7% Rule to approximate each of the following. 10. Using the values given above, label the normal curve at the right with the numerical values for u, uto, 20 and 3. 11. The longest 16% of all elephant pregnancies last at least how many days? 12. The middle 68% of all elephant pregnancies last between .......... and days. 13. Only 2.5% of all elephant pregnancies last longer than ............ days. 14. What percent of elephant pregnancies last less than 461 days?........... 15. What percent of elephant pregnancies last between 525 and 557 days? 16. What percent of elephant pregnancies last between 493 and 589 days? 17. What percent of elephant pregnancies last less than 557 days?