Which statements are true about the unknown side length in this right triangle? Check all that apply.
1. The equation a^2+(/13)^2=6^2 can be used to find the unknown length
2. The equation (/13)^2+b^2=6^2 can be used to find the unknown length
3.The equation (/13)^2+6^2=c^2 can be used to find the unknown length
4. The length of the unknown leg is /23 meters
5. The length of the unknown leg is 7 meters

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288

"curse these trig-loving pirates! " devora mutters as she looks at the map. then, after thinking for a moment, she walks back to the entrance of the secret cave, measuring 48 meters along the way. after performing a calculation, devora walks back to the empty treasure, faces the entrance, and turns a certain number of degrees to her left before walking 89 meters to the treasure. supposing that the angle at the cave entrance is acute and that devora's calculations were correct, how many degrees did she turn?