Arithmeticand geometric sequence word problems

in a certain region, the number of highway accidents increased by 20% over a four year period. how many accidents were there in 2006 if there were 5120 in 2002? (hint: when the percent increases, you want the original 100% plus the additional 20%).

a. write an equation for the sequence. explain where you found the numbers you are putting in the formula.
b. identify the value of n and explain where you found it. use the equation to solve the problem.

equations optional:

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?

Find the perimeter of the figure shown above. a. 50 cm c. 30 cm b. 64 cm d. 60 cm select the best answer from the choices provided a b c d

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11