V is directly proportional to the cube of (r+1) when r=1 v=24 . Work out the value of v when r=2

V = 81

Step-by-step explanation:

Write the formula:

V = k(r + 1)^3

Substitue your numbers in

24 = k(1 + 1)^3

Work out the constant which is K

24 = k(2)^3

24 = 8k

k = 3

Now that you've found K, substitue again

V = 3 X (2 + 1)^3

V = 3 X 3^3

V = 3 X 27

V = 81

$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