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zepelin [54]
3 years ago
8

Lin’s father is paying for a $20 meal.

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0
$15.81

15% of $20 is $3 so subtract that from $20 and u get $17.
Then 7% of $17 is $1.19 so subtract that from $17 and you get $15.81, which is the amount Lin’s father would pay for the meal in the end.
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It fills the cylinder up to 10 cm.

The volume of a cylinder is given by the formula
V = πr²h, where r is the radius of the base and h is the height of the cylinder.

The volume of a cone is given by the formula 
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Since the base of the flask and the cylinder are the same, this means r is the same number in both formulas.
Since the height of the flask and the cylinder are the same, this means h is the same number in both formulas.

This means that the only difference in the formulas is that the formula for the cone flask is 1/3 the formula for the cylinder.

The water that fills the cone flask will fill 1/3 of the cylinder; 1/3(30) = 10 
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A certain animated movie earned $ 1 . 1 ? 1 0 9 $1.1?10 9 in revenues at the box office. The movie lasts 9 . 1 ? 1 0 1 9.1?10 1
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Answer:

$1.21\times 10^{7} per minute.

Step-by-step explanation:  

We have been given that a certain animated movie earned $1.1\times10^{9} in revenues at the box office. The movie lasts 9.1\times10^{1} minutes.

To find the revenue earned per minute of the movie we will will divide 1.1\times10^{9} by 9.1\times10^{1}.

\text{The revenue earned per minute by the movie}=\frac{1.1*10^{9}}{9.1*10^{1}}  

Using quotient rule of exponents we will get,

\text{The revenue earned per minute by the movie}=\frac{1.1}{9.1}*10^{(9-1)}

\text{The revenue earned per minute by the movie}=\frac{1.1}{9.1}*10^{8}

\text{The revenue earned per minute by the movie}=0.1208791208791209\times 10^{8}

We can write 0.1208791208791209 as 1.208791208791209\times10^{-1}.

\text{The revenue earned per minute by the movie}=1.208791208791209\times 10^{-1} \times 10^{8}

Using product rule of exponents we will get,    

\text{The revenue earned per minute by the movie}=1.208791208791209\times 10^{-1+8}    

\text{The revenue earned per minute by the movie}=1.208791208791209\times 10^{7}

Upon rounding our answer to two decimal places we will get,

\text{The revenue earned per minute by the movie}=1.21\times 10^{7}      

Therefore, the movie had earned a revenue of $1.21\times 10^{7} per minute.

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1 divided by 4 is .25
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