7.) mya has ballet lessons every sixth day and swimming lessons every fourth day. today she has both lessons. in how many days will mya have both lessons on the same day again?

8.) a backpack at the store costs $24.94. a pack of markers at the same store costs $3.82. you pay for both the backpacks and pack of markers with a $50 bill. how much change do you receive?

Step-by-step explanation:

#8

step #1: add $24.94 with $3.82

            24.94 + 3.82 = 28.76

 Step #2: subtract  

       $50 - 28.76 = $21.24

34.5 cm

step-by-step explanation:

generally for a circular segment of angle, θ° and radius r

arc length

= (θ/360) x circumference

= (θ/360) x 2πr

in our case, θ = 60°, π=3.142 and r = 33 cm

substitute into above formula

arc length

= (60/360) x 2(3.142)( 33) = 34.5 cm