68. The 68-95-99.7 percent rule states that 68% falls within one standard deviation, 95% within 2, and 99.7% within 3. Since the standard deviation is 5, 47 and 57 are both one away, and because of that rule, the answer you need is 68%. Hope this helps.
Hi! So pretty much to find slope of a triangle you are going to use rise/run. The height being 12 and the length is 14. You get 12/14. Simplified is going to be 6/7. :)
