Show work and you! a sporting goods store marks up the cost s of soccer balls by 250%. write an expression that represents the retail cost of the soccer balls. the store buys soccer balls for $5.00 each. what is the retail price of the soccer balls

new price = cost + cost* percentage increase

250 percent = 2.5 as a decimal ( 250% = 250/100 = 2.5)

new price = cost + cost * 2.5

factor out cost

new price = cost(1+2.5)

new price = cost(3.5)

substitute the retail price (or cost)

new price = 5(3.5)

new price = 17.5

I am assuming the retail price is the selling price or the new price

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2