What is the relationship between the arc length and the radius of a circle when the central angle is defined in radians

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

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.

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3