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Olenka [21]
4 years ago
6

Selecting an Instructor At a convention there are 7 mathematics instructors, 5 computer science instructors, 3 statistics instru

ctors, and 4 science instructors. If an instructor is selected, find the probability of getting a science instructor or a math instructor.
Mathematics
1 answer:
LiRa [457]4 years ago
4 0

Answer:

11/19

Step-by-step explanation:

Firstly, we need to know the total number of instructors. This is equal to 7+5+4+3 = 19 instructors.

The probability of selecting a science instructor is 4/19

The probability of selecting a math instructor is 7/19

The probability of selecting either a science or a maths instructor is 4/19 + 7/19 = 11/19

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If each pound of beef costs $3.69, how much does 2 pounds cost? Round to the nearest cent.
Kryger [21]

Answer: Two pounds of beef costs $7.38.

Step-by-step explanation:

Multiply the cost for one pound by the amount of pounds you need.

$3.69×2=$7.38

I hope this helps!!

6 0
2 years ago
Read 2 more answers
Juma earns $12.50 for each newspaper subscription he sells. He also earns $50 base salary each week. If he wants to earn $400 ne
Mandarinka [93]
He would need to sell 28 because 
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4 0
3 years ago
Jenny bought 3 CDs that were each the same price. Including sales tax, she paid a total of $45.30 Of that total, $1.50 was tax.
enot [183]

Answer:

$13.6

Step-by-step explanation:

Jane bought 3 CDs that were each the same price. So let the price of each CD be ‘x’.

It is given that including sales tax, she paid a total of $45.30.

Also each CD had a tax of $1.50. We need to find out what the price of each CD was before tax.

Since the tax for all 3 CDs was same, the total amount of tax that she paid was:

3 * 1.50 = 4.50

Therefore the total tax on 3 CDs is $4.50

Since we already know the total price she paid for the CDs including taxes, we can find the price of each CD by the following way:

3x + 4.50 = 45.30

3x = 45.30 - 4.50

3x = 40.8

x = 13.6

Therefore the price of each CD before tax is $13.6.

5 0
3 years ago
11. 8 cars are in the parking lot. Then 6 more cars come. How many cars are there now? 12.stretch your thinking. Look at the sto
Sholpan [36]

Answer:

#11 : 14 cars

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Step-by-step explanation:

8 0
3 years ago
The height of a cone is twice the radius of its base.
riadik2000 [5.3K]

Answer:

⅔πx³

Step-by-step explanation:

The formula for the volume of a cone is

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    Let x = radius of base.

Then 2x = height, and

V = ⅓πx²·2x = ⅔πx³

6 0
3 years ago
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