Janelle has 342 pennies , 62 nickels, and 12 dimes. if janelle exchanges her coins for dollars, how many dollars will she have? how much cent will remain

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).

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.