4 years ago

An automated teller machine (ATM) requires a four-digit pin number, where each digit is 0 - 9.

Mathematics

1 answer:

Temka [501]4 years ago

7 0

The answer is 156 there is 156 combinations

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What’s the question?

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3 years ago

The veloctiy of sound in air is given by the equation v=20 times the square root of 273+t where v is the velocity in meters per

Nikitich [7]

So we just need to plug in our values and solve
$v = 20 \sqrt{273 + t}$
we are given v is 369 so we have
$369 = 20 \sqrt{273 + x}$
now we solve for x.
divide both sides by 20
square both sides
subtract 273 from both sides
$369 = 20 \sqrt{273 + x} \\ 18.45 = \sqrt{273 + x} \\ 340.40 = 273 + x \\ x = 67.4$
so a temp of about 67 degrees C

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3 years ago

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What is the quotient of 8 divided by 2/5 in a whole number

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To do 8 divided by two, you have use the keep change change rule, so it becomes:
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40/2 which simplifies to
20

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4 years ago

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Graham paid $87.45 for a pair of jeans. This amount included a tax of 40%. What was the cost of the jeans before tax?

kiruha [24]

The final price is the cost plus the tax.

Since we know the tax and a percent, we can write this as

T = C(1+r)

T = what Graham paid = $87.45

C = cost before tax

r = tax rate expressed as a decimal = .40

Plugging in what we know

87.45 = C (1+.4)

87.45 = C(1.4)

Divide both sides by 1.4

C = $62.46

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3 years ago

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