Pls help:/ (a) Find the decibel rating of a sound, d = 10 log I/1o having intensity 10,000,000,0001., where lo is the initial intensity.
(b) If the intensity of a sound is doubled, by how much is the decibel rating increased?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Find the area of the regular hexagon if a side is 20 cm.