2 x − 1 6 + ⋅ + 2 x − 1 6 + ( ⋅ ) 2 x - 1 6 + ⋅ + 2 x - 1 6 + ⋅

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).

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is