beta carotene is a precursor for vitamin a the body needs to convert it to retinol or vitamin a for use beta carotene is found naturally in mostly orange and dark green plant foods such as carrots sweet potatoes mangos and kaleitamin a is essential for good health it promotes growth the immune system reproduction and vision however recent research suggests that too much vitamin a particularly in the form of retinol may be bad for your bones
Because if you approximate pi, you get pi = 3.1415926535897932384626433832795...    Square root of 3.1415926535897932384626433832795... is 1.772453850905516027298167483â¦3411...... which is the square root of pi.    Hope that helps.
Since 13 is not a square number there is no exact real answer, but you can find an approximate value using the following (Newton-Raphson) iteration formula: xn+1=x n - (x2n -13)/(2xn). Using this formula the square root of 13 can be stated as 3.605551275 to 10 s.f. after 3 iterations starting from 3.5.