The Answer is $9.00 because if you just add 4.50 to 4.50 it is $9:00.
If the Diameter Is 4 inches then the radius will be 2 inches!
Hope I Helped!
Im not sure about the second one, but for the first one, Alex’s height is 167.64 cm. :)
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.