Please help me need before Monday

Answer:D 13Step-by-step explanation:(b^4)^4         b^5 * b^x-------------- = ----------------b^2                 b^4We know that a^c^d = a^ (c*d)b^(4*4)         b^5 * b^x-------------- = ----------------b^2                 b^4b^16         b^5 * b^x-------------- = ----------------b^2                 b^4We know that a^ c * a^d = a^ (c+d)b^16              b^(5+x) -------------- = ----------------b^2                 b^4We know that a^c / a^d = a^ (c-d)b^(16-2) = b^(5+x-4)b^14 = b^(1+x)Since the base is the same, the exponent must be the same14=1+xSubtract 1 from each side14-1 = 1+x-113 =x