Tessa bought stock in a restaurant for $273.00. Her stock is now worth $409.50. What is the percentage increase of the value of Tessa's stock? A.
50%
B.
137%
C.
67%
D.
33%

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).

Can someone me and plz do the problem

Identify the polynomial. a2b - cd3 a. monomial b. binomial c. trinomial d. four-term polynomial e. five-term polynomial