24 pounds of salt water 8% is salt .of another mixture 4% is salt. how many pounds of the second mixture should b added to the first mixture in order to get a mixture that is 5% salt?

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Me n o w. i need t h i s. 10 points

Ahovercraft takes off from a platform. its height (in meters), xx seconds after takeoff, is modeled by: h(x)=-2x^2+20x+48h(x)=−2x 2 +20x+48 what is the maximum height that the hovercraft will reach?