Nadia built a robot to filter air and water efficiently. she expects the robot to filter more than 343 liters of air and water while using less than 49 joules of energy. 12a+8w > 343 represents the number of minutes the robot filters air a and water w to filter more than 343 liters of air and water. 3a+4w < 49presents the number of minutes the robot filters air and water while using less than 49 joules of energy. does the robot meet both of nadia's expectations by filtering air for 20 minutes and filtering water for 15 minutes?

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet