SOLUTION: The Sky Telephone Company charges "a" cents for the first 3 minutes of a call and charges at the rate of r cents for each additional minute. If Jackson uses t minutes, where t>3,

Algebra ->  Expressions -> SOLUTION: The Sky Telephone Company charges "a" cents for the first 3 minutes of a call and charges at the rate of r cents for each additional minute. If Jackson uses t minutes, where t>3,      Log On


   



Question 1043532: The Sky Telephone Company charges "a" cents for the first 3 minutes of a call and charges at the rate of r cents for each additional minute. If Jackson uses t minutes, where t>3, how much, in dollars, is his call?
A) a+rt
B) a+r(t-3)
C) 0.01(a+r(t-3))
D) 0.01(a+rt-3)

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(B)
+a+%2B+r%2A%28+t-3+%29+
----------------
Suppose
+a+=+100+ cents
+t+=+20+ min
+r+=+10+ cents/min ( applies to +t%3E3+ )
-------------------
Cost of call = +100+%2B+10%2A%28+20+-+3+%29+
Cost of call = +100+%2B+10%2A17+
Cost of call = +270+
$2.70