The simple interest on a certain sum for 3 years at 8% per annum is $480 more than the simple interest on the same sum for 2 years at 9% per annum. Calculate the sum.​

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

Y+ 2/y is it a polynomial in one variable or not? and if so, why?