A forest covers 57,000 acres. A survey finds that 0.4% of the forest is old-growth trees. How many acres of old-growth trees are there?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?