A saleswoman is paid $13 per hour and $7 for each sale she makes. She wants to earn more than $160 in an 6-hour work period. What is the least number of sales she must make to reach her sales goal?

a. 12

b. 11

c. 10

d. 13

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40