You guys i need with something like this again

In general an annual rate of  compounded monthly will multiply the amount by a factor of  each month. 

Each month of 4.3% is a factor of  .  That goes for five months, so is multiplied by itself five times, so gets a fifth power.

Each month of 13.7% is a factor of .  He pays this for 12-5=7 months, so it gets an exponent of seven.

We started the year owing $2600 of principal, so after the year we owe

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Choice A.

One unique triangle, because those angles add up to 180, and that's how many degrees there are in one triangle.