Part 1. In January, the total cost for 300 minutes was $78 while in February, the total cost for 100 minutes was $66. The constant charge for each minute used is:

0.07
0.06
0.08

Part 2. The fixed montly fee charged by the carrier is;

fee =

step-by-step explanation:

mean or average is 40.6

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61