How would you use a number line to round 16,800 to the nearest ten thousand?

What is the measure of angle afe? 79 81 91 99

16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees