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faltersainse [42]
3 years ago
10

To gain access to his account, a customer using an automatic teller machine (ATM) must enter a four-digit code. If repetition of

the same four digits is not allowed (for example 5555), how many possible combinations are there?
Mathematics
1 answer:
VMariaS [17]3 years ago
8 0
I’m not really much sure, I tried.
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the radius of a gold atom is 1.35 angstroms. how many gold atoms would it take to line up a span of 8.5 mm?
serg [7]
The angstrom<span>, also known as the </span>angstrom<span> unit, is a measure of displacement equal to 0.0000000001 meter (10 -10 m). It would be helpful to convert the units of angstrom to mm. We do as follows:

diameter = 2 x 1.35 x10^ -10 m ( 1000 mm / 1 m ) = 2.7 x 10^-10 mm / atom

Number of gold atoms = 8.5 mm / </span>2.7 x 10^-10 mm / atom = 31481481481.481 atoms
6 0
3 years ago
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-3(-5)(-4)<br><br> i need help
tamaranim1 [39]

Answer:

If you are asking -3 times -5 times -4, then the answer -60

Step-by-step explanation:

-3*-5=15

15*-4=-60

5 0
3 years ago
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What is -87 + (-971)=
MrMuchimi

Answer:

-1058

Step-by-step explanation:

8 0
2 years ago
Can anyone please help me figure this out ​
Fed [463]

Answer:

x=27

Step-by-step explanation:

please give brainly

5 0
2 years ago
A fish tank is 3 feet by 4 feet by 5 feet. How many galoons of water will it hold? A cubic foot of water is 7.5 gallons.
likoan [24]

Answer: 8 gallons of water.

Step-by-step explanation:

3 x 4 x 5 = 60.

60 divided by the number of gallons per cubic foot 7.5 = 8 gallons. :)

6 0
3 years ago
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