The price of a pair shoes is 28$ the sale tax rate is 2.39 percent what is the total amount you would pay if you bought these shoes

Me answer number 3plz explain how you do it

If lmn=xyz, which congruences are true by cpctc? check all that apply

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above