5) If f has a derivative at x=a, then f is continuous at x=a
A. Always rue
B. Always false
C. May be true
D. May be false

Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?