(8ab^3)(3a^4) answer should be a simplified polynomial

Which expression is equivalent to −16y+13 ? −16(−y+13) 16(−y+2) −16(y+2) 16(−y+13)

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?