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Tpy6a [65]
3 years ago
12

Dawn draws 1 card, replaces it, and draws another card. Is it more likely that she draws 2 red cards or 2 face cards? Can someon

e help me with this?
Mathematics
1 answer:
Llana [10]3 years ago
3 0
Red card because it is a fifty fifty chance for the colors but a 3 in 10 chance for a face card
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Write an expression to match the words three times the sum of 8and 4
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3x8+4 because 3 times so that is 3 x the sum of 8 and 4 so 8+4 together it would be 3x8+4
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You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physics. Y
Troyanec [42]
Staals half
1 gram left
0.3 grams left
half lives are normally written in years
it goes likt this

A=P( \frac{1}{2})^ \frac{t}{h}
A=final amount
P=initila amount
t=time elapsed
h=time half life is (same units as time)

let's use days as the units of time


we are given
initial amount=1gram
final amount=0.3gram
time=4 days

so
0.3=1( \frac{1}{2})^ \frac{4}{h}
solve for h
0.3=( \frac{1}{2})^ \frac{4}{h}
take the ln of both sides
ln(0.3)=ln( \frac{1}{2})^ \frac{4}{h}
ln(0.3)=\frac{4}{h}ln( \frac{1}{2})
times both sides by h
hln(0.3)=4ln( \frac{1}{2})
divide both sides by ln(0.3)
h= \frac{4ln( \frac{1}{2}) }{ln(0.3)}
use calculator
h=2.30287
3 sig figs
h=2.303 days
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3 years ago
Susie has $2 in coins in her purse. She has 3 times as many quarters as nickels. She has twice as many dimes as nickels. How man
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Answer:

120 coins our in her purse if the 2 dollar factor is made up of nickels

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What 2 whole numbers is the square root of 75 between?
Nataliya [291]

Answer:

8 and 9

Step-by-step explanation:

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PLEASE??can someone give me help ?
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It is D that makes scene

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