Answer:
30 +0.45(m -500) . . . . for m > 500
Step-by-step explanation:
If talk time is "m" minutes, then the number of "additional minutes" is ...
m -500
The cost of those is $0.45 each, so (in dollars), the charge for additional minutes is ...
0.45(m -500)
The charge of $30 applies regardless of the number of minutes, so is added to the minutes charge. The total cost of a bill for talking more than 500 minutes is ...
30 +0.45(m -500)
_____
The cost for talking 500 minutes or less is simply 30.
Answer:
8y²
Step-by-step explanation:
8y³ = 8y² (y)
64y² = 8y² (8)
Answer:
4 minutes.
Step-by-step explanation:
There are three trains that Rachel has to take to go to her job. The total time is taken by her, on average, 1 hour and 20 minutes i.e. (60 + 20) = 80 minutes.
In his journey, she walks for 15 minutes and a train journey for about 53 minutes.
Then the total waiting time for the trains is (80 - 53 - 15) = 12 minutes.
Therefore, the average waiting time, in minutes, at each of the three train stations will be 
minutes. (Answer)
The velocity is 7.44m/s in a direction to the west
