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Elina [12.6K]
3 years ago
10

Which of the following situations results in a sale price that is less than or equal to $20.00? Select two that apply. A A $29.9

9 lamp is on sale for 35% off. B A $39.99 set of pans is on sale for 45% off. C A $49.99 chair is on sale for 60% off. D A $59.99 video game is on sale for 40% off.
Mathematics
1 answer:
Mademuasel [1]3 years ago
3 0
A) 29.99 x 0.35 = $10.50
     29.99 - 10.50  = $19.49 (about 19.50)

B) 39.99 x 0.45 = 17.99 (about $18)
     39.99 - 17.99 = $22

C) 49.99 x 0.60 = $29.99
     49.99 - 29.99 = $20.00

D) 59.99 x 0.40 = $23.996 (about 24)
     59.99 - 24 = $35.99

Answers: A and C
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3 years ago
A 3-gallon tub of ice cream yields about 90 scoops of ice cream. There are roughly 3785 cubic centimeters in 1 gallon. Determine
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The radius of the scoop is r = 3.1 cm

Step-by-step explanation:

Since 3 gallons yields 90 scoops, and 1 gallon = 3785 cm³.

3 gallons = 3 × 3785 cm³ =  11355 cm³

So we have 11355 cm³ in 3 gallons which is also the volume of 90 scoops.

Since 90 scoops = 11355 cm³, then

1 scoop = 11355 cm³/90 = 126.2 cm³

Now, if each scoop is a sphere, the volume is given by V = 4πr³/3 where r is the radius of the scoop. Since we need to find the radius of the scoop, r, making r subject of the formula, we have

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Substituting V = 126.2 cm³, we have

r = ∛(3× 126.2 cm³/4π)

= ∛(378.6 cm³/12.57)

= ∛30.13 cm³

= 3.1 cm

So, the radius of the scoop is r = 3.1 cm

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