A store owner bought skateboards for $34 and sold them for $51. What is the mark-up, as a percentage?

0.50%

Step-by-step explanation:

34 x 0.50 = 17

(17 dollers is charged extra)

(34 dollers is the cost of the skate board)

17 + 34 = 51

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

$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