The price of an 8-minute phone call is $1.20. What is the price of an 18-minute phone call?

$2.70 cents

Step-by-step explanation:

Given the following question:



In order to find the answer, we will find how much it costs each minute by dividing.




Now multiply:




Which means for an 18-minute phone call it would cost "$2.70 cents."

Hope this helps.

  n=   0.0000 - 0.3750 i  

  n=   0.0000 + 0.3750 i

step-by-step explanation:

one of these should be correct

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92