What is the twice the difference of a number and four is less then eight

n < 8

{n|n are all rational numbers less than positive 8}

Step-by-step explanation:

If you convert it, it'll be:

2 × ( n - 4 ) < 8

Distribute 2:

2n - 8 < 8

2n - 8 + 8 < 8 + 8

2n < 16

2n/2 < 16/2

n < 8

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50