10. A cell phone originally cost $550.79 and was marked up 5%. What is the new cost of the cell phone?

$578.33

Step-by-step explanation:

To get 5% of the original cost you need to multiply by 0.05

550.79 • 0.05 = 27.5395

27.5395 is 5% of 550.79

Since the price is marked up 5% you will need to add 27.5395 to 550.79

550.79 + 27.5395 = 578.3295

Then you will round your answer to 578.33

bus = (120/360) × 36

= 12 pupils

walk = (90/360) × 36

= 9 pupils