Hfnn he didchx the same as real
For f(-2), x will equal -2.
Plug the x-value into the equation:

A negative exponent means that the term turns into a fraction, with 1 as the numerator and the positive exponent as the denominator.
Solve 2^(-2):

Solve the problem:

f(-2) will equal
1/2.
You multiply the original price by .20
4 - Grams = 4,000 kilograms
Hope this helps ! :)
6 gallons in 4 1/2 seconds to travel 1/4 mile
Multiply through by 4
-------
The dragster will :
use 24 gallons in 18 seconds to travel 1 mile.