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Nataly [62]
1 year ago
14

In a survey of 400 seniors, x percent said that they plan on majoring in physics. One university has used this data to estimate

the number of physics majors it expects for its entering class of 3,300 students. If the university expects 66 physics majors, what is the value of x
Mathematics
1 answer:
azamat1 year ago
8 0

Answer:

2 percent

Step-by-step explanation:

We can use two separate fractions, one representing the amount of physics majors expected and the amount of seniors expected in physics majors by the university.

\frac{400x}{66} = \frac{400}{3600}

Now cross multiply.

\frac{66*400}{400x * 3600}

x will be removed.

\frac{26400}{1320000}

Simplifying this fraction will get you \frac{1}{50}, which in percentage form, will be 2 percent.

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Step-by-step explanation:

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3 years ago
The average price of gasoline in Paris, France, is 1.91 euros per liter. If there are 3.785 liters in one gallon, and the exchan
kirill [66]

Answer:

The price of gasoline in Paris is $6.00/gallon

Step-by-step explanation:

We are asked to find the price of gas in dollars per gallon for gasoline in Paris.

Step 1

We are told in the question that: the average price of gasoline in Paris, France, is 1.91 euros per liter.

Also we are told that, the exchange rate is 1.203 euros for one dollar

We convert the Euros to dollars

If, 1.203 euros = 1 dollar

1.91 euros = x dollars

We Cross Multiply

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x dollars = 1.91 euros × 1 dollar/ 1.203 euros

x dollars = 1.5876974231 dollars

Therefore, 1.203 euros = Approximately 1.59 dollars.

Hence, the price of gasoline in Paris, France is 1.59 dollars per liter.

Step 2

We convert the from liter to gallon

In the question, we are told that:

If there are 3.785 liters in one gallon

Therefore, if

1 liter of gasoline = 1.59 dollars

3.785 liters of gasoline =

Cross Multiply

= 3.785 liters × 1.59

= 6.01815 dollars.

Approximately to the nearest whole number = 6.00 dollars.

Since 3.785 liters of gasoline = 1 gallon of gasoline, therefore, the price of gas in dollars per gallon for gasoline in Paris is $6.00/gallon

7 0
3 years ago
The cost of having a window fixed is $100 plus $20 per hour of labor. Using h for the number of hours of labor, write an express
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Answer:

Step-by-step explanation:

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3 years ago
What is the volume of a sphere with a diameter of 6 m, rounded to the nearest tenth of a cubic meter?
seraphim [82]

Answer:113 cubic meter

Step-by-step explanation:

Diameter=6

Radius=r=6/2

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Volume of sphere=4/3 x π x r x r x r

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Volume of sphere=339.12 ➗ 3

Volume of sphere=113.04

Volume of sphere =113 cubic meter

6 0
3 years ago
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