b. ( 1265(1+0.115times frac (87)/(365)))(1+0.125times (4.3)/(365))

Here's the solution to the calculation:<br /><br />b. $\frac {\$ 1265(1+0.115\times \frac {87}{365})}{1+0.125\times \frac {43}{365}}$ (I assume you meant 43 days, not 4.3)<br /><br />**1. Calculate the interest in the numerator:**<br /><br />* $0.115 \times \frac{87}{365} = 0.027260274$<br /><br />* $1 + 0.027260274 = 1.027260274$<br /><br />* $1265 \times 1.027260274 = 1299.778082$<br /><br />**2. Calculate the interest in the denominator:**<br /><br />* $0.125 \times \frac{43}{365} = 0.014712329$<br /><br />* $1 + 0.014712329 = 1.014712329$<br /><br />**3. Divide the numerator by the denominator:**<br /><br />* $\frac{1299.778082}{1.014712329} = 1280.656784$<br /><br />**Therefore, the final answer is approximately $1280.66.**<br />