The Roaming Cell Phone Company charges $0.20 per minute of airtime usage plus $15.00 monthly . If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)? Circle the correct
A- y = 12.50 + 30x
B- y = 30 + 12.50x
C- y = 12.50 + 30
D- 12.50x = 30

Which graph represents the following piecewise defined function?

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76