Astore owner buyso backpacks at a certain price and sells them at a higher price. the difference is called the markup. if she pays 21$ for a backpack and adds a 40% markup on the price she paid, what is the selling price?

The selling price is $29.40

10% of $21 = $2.10

$2.10 x 4 = $8.40 = 40%

$21 + $8.40 = $29.40

Hope this helps!

b) the dogs need to shift their focus to human scent.

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13