The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sounds is 10^-10 watt/m^2.

the level of sound in the quiet room is (10,20, or 100) db, and the intensity of sound in the busy street is (10^-1, 10^-5, or

10^-10) wat/m^2.

use the formula b=10log(i/io) , where b is the sound level in decibels, i is the intensity of sound, and io is the smallest sound intensity that can be heard by the human ear (roughly equal to 1x10^-12 watts/m^2).

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.