the position vector of a particle moving in the x-y plane is <2 cos t, 4 sin t> in the interval [0,2pi). for what value(s) of t does the path of the particle have a vertical tangent?

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

I’m which figure is point g an orthocenter

Factor and solve to find roots x squared -x - 90 =0