Penny invested $320 at the start of the year. At the end of the year, she had $345. What is the annual effective yield of her investment? Input your answer as a percentage to two decimal places but omit the % sign (7.2564% should be input as 7.26.)

I'm confused on this could anyone me and show me what i need to do to solve it.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Lesson 9-3 for items 8-10, a square is drawn in the coordinate plane, with vertices as shown in the diagram. then the square is reflected across the x-axis. -2 4 8. the function that describes the reflection is (x, y) - a. (x, y-3). b. (x, y-6). c. (-x, y). d. (x,- y).