A tour guide offers to show tourists 18 historical landmarks during a 12 3/4 day trip. How many days are needed to tourists to
see 12 historical landmarks?

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10