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xenn [34]
3 years ago
5

what is the probability of drawing a heart from a deck of cards and then replacing it and then drawing a club​

Mathematics
2 answers:
sineoko [7]3 years ago
8 0

Answer:

i think 13/52

Step-by-step explanation:

Nina [5.8K]3 years ago
8 0

Answer:

The probability of drawing a heart is 1 in 4 because there are 13 of each variant and 52 total cards.  But I think it is a 1 in 8 that then you get a club.

Step-by-step explanation:

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WHAT IS -(-2z+5y) HELP MY HOMEWORK IS DUE IN 50 MINUTES PLEASE
vampirchik [111]

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{2z - 5y}}}}}

Step-by-step explanation:

\sf{ - ( - 2z + 5y)}

Distribute negative ( - ) sign through the parentheses

\sf{( - ) \times ( - 2z)  + ( - ) \times (5y)}

\dashrightarrow{ \sf{2z   + ( - 5y)}}

\dashrightarrow{ \sf{2z - 5y}}

Hope I helped!

Best regards! :D

7 0
3 years ago
Help with math please!
MissTica

Answer:

3 in each box

Step-by-step explanation:

3 0
3 years ago
Please help me, i've asked before but go no answer. Brainliest to correct answer and thanks to all answers
Minchanka [31]

Answer:

The answer is B.

Step-by-step explanation:

All other answers are irrational

7 0
3 years ago
A scientist left a 32-gram sample of a radioactive substance out and it was exposed to the air. After 30 minutes, only 26 grams
crimeas [40]

Answer:

There were 1.155 g of the substance eight hours later and it's halflife time is 1.66943 h.

Step-by-step explanation:

Since radiactive decay is expressed by a exponential function of the following kind:

mass(t) = mass(0)*e^(-a*t)

Where mass(t) is the mass of the substance at a given time, mass(0) is the inital mass substance, a is a factor that defines how fast the substance will decay and t is the elapsed time. The problem provided us with all the needed information to create the expression, with the exception of the "a". So we can apply it to the known point in order to determine "a". We have:

mass(0.5) = 32*e^(-a*0.5)

26 = 32*e^(-a*0.5)

e^(-0.5*a) = 26 / 32

e^(-0.5*a) = 0.8125

ln[e^(-0.5*a)] = ln(0.8125)

-0.5*a*ln(e) = ln(0.8125)

-0.5*a = ln(0.8125)

a = -ln(0.8125)/0.5 = 0.4152

So the expression that represents the mass of the substance over time is given by:

mass(t) = 32*e^(-0.4152*t)

After 8 hours we have:

mass(8) = 32*e^(-0.4152*8) = 32*e^(-3.3216) = 1.155 g

The half life is the time it'll take to reach half it's original mass, therefore:

16 = 32*e^(-0.4152*t)

32*e^(-0.4152*t) = 16

e^(-0.4152*t) = 16 / 32

e^(-0.4152*t) = 0.5

ln[e^(-0.4152*t)] = ln(0.5)

-0.4152*t = ln(0.5)

t = -ln(0.5)/0.4152 = 1.66943 h

4 0
3 years ago
The tables below show four ratios of measurements.
Mkey [24]

Answer:D.

Step-by-step explanation:

yards to feet equals 0.3 repeating

Pounds to ounces equals 0.0625

Gallons to pints equals 0.125

Centimeters to millimeters equals 0.1

So d is the right answer

3 0
2 years ago
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