writing equation, i start with 27/2 gallons of gas, for every mile driven gas decreases by 1/16 of a gallon, if B is the amount of gas left after driving R miles, write an equation that represents this situation

An energy plant is looking into putting in a system to remove harmful pollutants from its emissions going into earth's atmosphere. the cost of removing the pollutants can be modeled using the function c = 25000p/100 -p what is the vertical asymptote?

Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4

Pls the last one and it has to be like number 6