Solve log x = 3. Please help me here, thank you have a great day/night

You receive 15% of the profit from a car wash how much money do you receive from a profit of 300

M. xyz =radians. covert this radian measure to its equivalent measure in degrees.

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )