The series 2 + 8 + 14 + ... + 896 + 9022+8+14+...+896+9022, plus, 8, plus, 14, plus, point, point, point, plus, 896, plus, 902 can be written using sigma notation (also called summation notation): \large\displaystyle\sum\limits_{k=1 }^{n}{{a_k}}
k=1
∑
n

a
k

From the beginning of the day the temperature rose 15 degrees so that by 4 pm it was 87 degrees. what was the temperature at the start of the day

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?