EASY MATH ALGEBRA 1 PLEASE HELP

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function. a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.