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TiliK225 [7]
3 years ago
12

What is the probability of selecting a jack then a 4 from a deck of cards with replacement?

Mathematics
2 answers:
harina [27]3 years ago
7 0

Answer:

1/169.

Step-by-step explanation:

Prob( a jack) = 4/52 = 1/13

Prob( a 4) = 4/52 = 1/13

Required probability = 1/13 * 1/13

= 1/169.

postnew [5]3 years ago
5 0

Answer:

\frac{4}{663}

Step-by-step explanation:

A standard deck without jokers is 52 cards. Selecting a Jack would have a \frac{1}{13} chance.

Then to select a 4 without replacing the Jack you took, you would have a \frac{4}{51} chance.

\frac{1}{13}*\frac{4}{51}=\frac{4}{663}

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8.1 = 0.9a, how do you solve?
GrogVix [38]

Answer:

a = 9

Step-by-step explanation:

Simplifying

8.1 = 0.9a

Solving

8.1 = 0.9a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-0.9a' to each side of the equation.

8.1 + -0.9a = 0.9a + -0.9a

Combine like terms: 0.9a + -0.9a = 0.0

8.1 + -0.9a = 0.0

Add '-8.1' to each side of the equation.

8.1 + -8.1 + -0.9a = 0.0 + -8.1

Combine like terms: 8.1 + -8.1 = 0.0

0.0 + -0.9a = 0.0 + -8.1

-0.9a = 0.0 + -8.1

Combine like terms: 0.0 + -8.1 = -8.1

-0.9a = -8.1

Divide each side by '-0.9'.

a = 9

Simplifying

a = 9

5 0
3 years ago
Need helps plsssssssssssssss
slavikrds [6]

Answer:

64

Step-by-step explanation:

4^3 is just 4*4*4

so 4*4=16

and 16*4=64

TADAAAAAAAAAA

6 0
3 years ago
Read 2 more answers
PLEASE HELP!!! I don't understand it
Len [333]

Answer:

A

Step-by-step explanation:

This is exponential decay; the height of the ball is decreasing exponentially with each successive drop.  It's not going down at a steady rate.  If it was, this would be linear.  But gravity doesn't work on things that way.  If the ball was thrown up into the air, it would be parabolic; if the ball is dropped, the bounces are exponentially dropping in height.  The form of this equation is

y=a(b)^x, or in our case:

A(n)=a(b)^{n-1}, where

a is the initial height of the ball and

b is the decimal amount the bounce decreases each time.  For us:

a = 1.5 and

b = .74

Filling in,

A(n)=1.5(.74)^{n-1}

If ww want the height of the 6th bounce, n = 6.  Filling that into the equation we already wrote for our model:

A(6)=1.5(.74)^{6-1} which of course simplifies to

A(6)=1.5(.74)^5 which simplifies to

A(6)=1.5(.22190066)

So the height of the ball is that product.

A(6) = .33 cm

A is your answer

3 0
3 years ago
9 is to 3 as 4 is to
FrozenT [24]
9 is to 3 as 4 is to 8!
8 0
3 years ago
Read 2 more answers
What dose e stand for when 1.89 times 10 to the 12 power
tangare [24]
1.89 * 10^12
1.89e +12
e is shorthand for *10^(
4 0
3 years ago
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