Please help me with these three questions asap, thank you

What happens to the area as the sliders are adjusted? what do you think the formula for the area of a triangle is divided by 2?

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?