Which equation can be used to find the answer?

dania marks off 18.7 m of a playing field for a sports festival. she needs to mark off a total of 29 m to finish the field. how many more meters does dania have left to mark off?

a.
f = 29 ÷ 2
f = 14.5
14.5 m

b.
f – 18.7 = 29
f = 47.7
47.7 m

c.
f = 18.7 · 2
f = 37.4
37.4 m

d.
f + 18.7 = 29
f = 10.3
10.3 m