How many moles of ammonia (nH4) are there in 405 liters of ammonia at STP?

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Which graph corresponds to the function f(x) = x2 + 4x – 1?