Patricia pays $1.19 each to download songs to her mp3 player, if n is the number of downloaded songs, which equation represents the cost c in dollars?

a. c=1.19n
b. n=1.19c
c. c=1.19/n
d. c=n+1.1

Steve earns $8 per hour his older brother earns $2 more per hour than steve what is the ratio of the money steve earns in an hour to the money of his brother earns in an hour.

The lee family bought their home for $220,000 this year. the equation =220,000(1.038) v = 220 , 000 ( 1 . 038 ) x can be used to find the value, v, of their home after x years. which will be the value of the lee family's home in 5 years?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?