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Murrr4er [49]
3 years ago
5

A thief steals an ATM card and must randomly guess the correct five​-digit pin code from a 7​-key keypad. Repetition of digits i

s allowed. What is the probability of a correct guess on the first​ try?
Mathematics
1 answer:
bearhunter [10]3 years ago
3 0

Answer:

1 in 16,807 chance or a 0.00595% chance

Step-by-step explanation:

There is only one correct 5-digit pin that the thief must guess. If there are 7 possible values for each of the five digits, the total number of combinations is:

n = 7*7*7*7*7\\n= 16,807\ possibilities

Therefore, there is a 1 in 16,807 chance or a 0.00595% chance that the thief will guess on the first try.

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The arc length of a sector created by a 90° angle is 25 cm. What is the circumference of the entire circle? Express
docker41 [41]

Answer:

We know length of one quarter of a circle = 2πr/4 = πr/2

So here we can make the equation for to find thr value of radius r

length of one quarter given = 25 cm

so πr/2 = 25 cm

=> πr = 50 cm

=> r = 50/π cm

So the entire circumference of circle =

2πr

= 2 π 50/π cm

= 100π/π cm (ans)

Here we dont substitute the value of π due to represent the answer in terms of pi.

Hope it helps you

6 0
3 years ago
Let t = 5. What is the value of (35 ÷ t) · 4?
lora16 [44]
Anwser: 28 :) 35 DEVIDED BY 5 IS 7 AND 7 X 4 IS 28
3 0
3 years ago
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How many times greater is The total area of Russia than the total area of Finland? Finland total area is 3.4 x 10 to the 5th pow
Luden [163]

Answer:

The answer to your question is Russia is 50 times greater than Finland.

Step-by-step explanation:

Data

Finland area = 3.4 x 10⁵ km²

Russia area = 1.7 x 10⁷ km²

Proportion = ?

Process

1.- Just divide the Russia's area by the Finland's area.

   Proportion = \frac{Finland's area}{Russia's area}

   Proportion = \frac{1.7 x 10^{7} }{3.4 x 10^{5} }

   Porportion = 50

6 0
3 years ago
Rearrange the formula to make x the subject:<br> A = 1/2xy
Maslowich

Answer:

x = \frac{2A}{y}

Step-by-step explanation:

Given

A = \frac{1}{2} xy

Multiply both sides by 2 to clear the fraction

2A = xy ( divide both sides by y )

\frac{2A}{y} = x

3 0
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Answer:

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Step-by-step explanation:

I hope this is correct!

8 0
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