40% is the same as 40/100 so just multiply that with 60
60 x 40/100 = 24
thats how much is taken OFF so
60 is the original price and you get 40% discount off which is $24 on this specific item. how much is the price now?
For this do 5/8-1/2!! in order to do this, find the common denominator. this one is 16, so do: 10/16-8/16, and simplify!
11+5=16 3x2= 6 8x1= 8 so add it together, 16 + 6 + 8 = 30.

(a) For dx/dt=6, dy/dt = 2·6 = 12
(b) For dy/dt=2, 2 = 2·dx/dt ⇒ dx/dt = 1
_____
The value of x is irrelevant for this question.
=====
If your function is 2^x +1 or 2^(x +1), it needs to be written as such. The answer above applies to the function given.