ElectricPavlov

Need the associated diagram......

Find the circumference of the circle....this is the length of the track

   pi * d  = circumference

   pi * d = pi * 2r

               pi * 2 (150) = 942.477 ft around the track

                     four times around would be   4 * 942.477 = 3769.91 ft ~~3770 ft

a)  40000 / 1600000     * 100% =  2.5%

b)  3600000 * .98      *   .025  =  sh 88200.

First find the balance after 2 years

6% is .06 in decimal    per month interest is   .06/12 = .005

24 months

8000 ( 1 + .005)²⁴ = 9017.28

    then pay 4000  resulting in NEW balance of 5017.28

Now you have this new balance for two years at 7% comp annual

   5017,28 ( 1 + .07)² =  $5744.28

       pay 4000 dollars to bring balance down to  1744.28

Now 3 years at 7% compounded monthly

    1744.28 ( 1 + .07/12)³⁶ = $  2150.57   final payment

I am not sure what you intend to ask here ....can you clarify?

NOT POSITIVE OF THIS ANSWER 

MY ASSUMPTION IS   how much is needed in April to have 1600 nine quarters later?

From April 30, 2021 to July 31, 2023    is  NINE quarters    (Melody used 11 here....hmmmmmm I think she added 8 quarters and 3 months =11)

9.9%   is   .099 in decimal         .... the   period (quarter) interest is  .099/4 = .02475

1600 = x (1 + .02475)⁹

x = $ 1283.98

SO the PROCEEDS would be   1600 - 1293.98  = $ 316.02

Just a freindly warning.....

    NASA lost a very expensive satellite a few years ago because someone left units off of a calculation ...or used    feet instead of cm   or someothing like that ....  UNITS are VERY   VERY important !!!!.....especially if you are dealing with people's lives ( like medicine doses)...or engineering:
FROM 1999:

NASA lost a $125 million Mars orbiter because a Lockheed Martin engineering team used English units of measurement while the agency's team used the more conventional metric system for a key spacecraft operation, according to a review finding released Thursday.

Decreasing something 26% leaves   74 %

74% * 50   = .74 * 50 = 37

...only partial credit for not including units    this WILL happen in your further education or when working in the REAL WORLD  !!

       12 FT X 14 FT =   168 FT²

0  = 5 -  1/2 a t^2     where a is acceleration of gravity   32.2 ft/s