One kind of starfish has 5 arms how many arms are on 21 starfish

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.