Write the series using summation notation. Then find the sum of the series. 1 + 2 + 3 + ++ + 12

And

1/2 + 1/4 + 1/6 + ++ + 1/14

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

The width of a rectangle is 20 units. can the perimeter p of the rectangle be 64 units when its length x is 11 units? no, because p = 2x + 2(20) no, because p ≠ 2x + 2(20) yes, because p ≠ 2x + 2(20) yes, because p = 2x + 2(20)

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?