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2 years ago

An item that originally costs $45 was on the clearance aisle for $33.75.

Mathematics

2 answers:

Ede4ka [16]2 years ago

6 0

Answer:

25% off - savings of $11.25

Step-by-step explanation:

To find discount percentage = ((List price - sale price) / List price) * 100

olga55 [171]2 years ago

5 0

Answer:

25%

Step-by-step explanation:

D=(L-S)/L*100

D=(45-33.75)/45*100

D=11.25/45*100

D=0.25*100

D=25

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Dr.Lamb is mixing a solution for his next patient. He has a cylindrical test tube which is 4 inches across on the inside. The de

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Answer: There are 34.35 liters left in the test tube.

Step-by-step explanation:

Since we have given that

Depth of the tube = 9 inches

Circumference of base=4 inches

As we know the formula of circumference ,

$Circumference=2\pi r\\\\4=2\times \frac{22}{7}\times r\\\\4\times{7}{22\times 2}=r\\\\\frac{7}{11}=r$

Now, we need to find the volume of tube is given by

$\text{ Volume of test tube }=\pi r^2h\\\\\text{ Volume of test tube }=\frac{22}{7}\times \frac{7}{11}\times \frac{7}{11}\times 9\\\\\text{ Volume of test tube }=\frac{126}{11}=11.45\ inches^3$

Since we have also given that,

Of 1 cubic inch of space holds 3 liters of water,

So,

$1\text{ cubic inch}=3\text{ liters}\\\\11.45\text{ cubic inches}=3\times 11.45=34.35\text{ liters}$

Hence, there are 34.35 liters left in the test tube.

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