The profile of the cables on a suspension bridge may be modeled by a parabola. the central span of a bridge is 1270 ft long and 157 ft high. the parabola y=0.00039x^2 gives a good fit to the shape of the cables, where ixi less than of equal to 635, and x and y are measured in feet. approximate the length of the cables that stretch between the tops of the two towers.

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

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?

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)