Are natural number always, sometime, never rational number

What is the square root of 45? (step by step working plz)

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Worth 15 points handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony? a= p = 1/4 b= p+0.25p c=(p + 1/4)p d=5/4p 0.25p choose 2 answers