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Mathematics

1 answer:

kupik [55]3 years ago

8 0

It’s 11 I’m pretty sure

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2. Convert 9% to a fraction and a decimal.

Furkat [3]

Answer:

0.09 decimal 9/100 fraction

Step-by-step explanation:

4 0

3 years ago

Pls give the correct answer im giving 20 points

anzhelika [568]

Answer:

equation L x D

they built 114 miles onto the road and the full length is 172 miles.

5 0

2 years ago

Solve the following system of equations algebraically 3x-y=0 5x+2y=22

Lyrx [107]

3x - y = 0 ⇒ 2(3x - y = 0 ) ⇒ 6x - 2y = 0

5x + 2y = 22 ⇒ 1(5x + 2y = 22) ⇒ 5x + 2y = 22

11x = 22

x = 2

3x - y = 0 ⇒ 3(2) - y = 0 ⇒ 6 - y = 0 ⇒ 6 = y

Answer: x=2, y=6

3 0

3 years ago

The radioactive isotope radium has a half-life of 1,600 years. The mass of a 100-gram sample of radium will be______ grams after

Olenka [21]

To solve this we are going to use the half life equation $N(t)=N_{0} e^{( \frac{-0.693t}{t _{1/2} }) }$
Where:
$N_{0}$ is the initial sample
$t$ is the time in years
$t_{1/2}$ is the half life of the substance
$N(t)$ is the remainder quantity after $t$ years

From the problem we know that:
$N_{0} =100$
$t=200$
$t_{1/2} =1600$

Lets replace those values in our equation to find $N(t)$ :
$N(200) =100e^{( \frac{(-0.693)(200)}{1600}) }$
$N(200)=100e^{( \frac{-138.6}{1600} )}$
$N(200)=100e^{-0.086625}$
$N(200)=91.7$

We can conclude that after 1600 years of radioactive decay, the mass of the 100-gram sample will be 91.7 grams.

8 0

3 years ago

Mr. Dean had 4/5 he wanted to give his student 1/6 how many does he give them

Sunny_sXe [5.5K]

Answer:

$\frac{2}{15}$