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d1i1m1o1n [39]
3 years ago
7

I WILL MARK BRIANLIEST!!

Mathematics
1 answer:
faltersainse [42]3 years ago
7 0

Answer:

A = 95.03in² or 95.03 ( rounded to the nearest hundredth )

Step-by-step explanation:

The approximate area of a circle that has a diameter of 11 inches, rounded to the nearest hundredth is 95.03.

Formula: A=1/4πd²

A=1

4πd^2=95.03.

4·π·11^2≈95.03318in²

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An equation in the system is y = x + 1. What is the other equation in the system if the solution is only at (0, 1)?
Setler [38]
<span>x + y = 0 hope this helps </span>
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ΔA'B'C' was constructed using ΔABC and line segment EH.
Ivenika [448]

Answer: 1,3,4

Step-by-step explanation:

3 0
2 years ago
Element X decays radioactively with a half life of 12 minutes. If there are 200 grams of Element X, how long, to the nearest ten
Semenov [28]

Answer:

It would take 24 minutes for the element to decay to 50 grams

Step-by-step explanation:

The equation for the amount of the element present, after t minutes, is:

Q(t) = Q(0)e^{-rt}

In which Q(X) decays radioactively with a half life of 12 minutes.(0) is the initial amount and r is the rate it decreases.

Half life of 12 minutes

This means that Q(12) = 0.5Q(0)

So

Q(t) = Q(0)e^{-rt}

0.5Q(0) = Q(0)e^{-12r}

e^{-12r} = 0.5

\ln{e^{-12r}} = \ln{0.5}

-12r = \ln{0.5}

12r = -\ln{0.5}

r = -\frac{\ln{0.5}}{12}

r = 0.05776

If there are 200 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 50 grams?

This is t when Q(t) = 50. Q(0) = 200.

Q(t) = Q(0)e^{-rt}

50 = 200e^{-0.05776t}

e^{-0.05776t} = 0.25

\ln{e^{-0.05776t}} = \ln{0.25}

-0.05776t = \ln{0.25}

0.05776t = -\ln{0.25}

t = -\frac{\ln{0.25}}{0.05776}

t = 24

It would take 24 minutes for the element to decay to 50 grams

6 0
3 years ago
Use the distributive property to show why the product (-6)(-3) is positive .
Alla [95]

Porque menos por menos es más es una regla

Si multiplicas (-6)(-3) La respuesta es 18 es positivo porque se cumple la regla de menos por menos es más

REPASA

MENOS POR MENOS = MÁS

MÁS POR MÁS = MÁS

MAS POR MENOS = MENOS

MENOS POR MAS = MENOS

3 0
3 years ago
69% of 9.1 = <br><br> please answer
emmainna [20.7K]

Answer:

6.279

Step-by-step explanation:

69% of 9.1

= 69/100 × 9.1

= 0.69 × 9.1

= 6.279

Hope it helps ⚜

6 0
2 years ago
Read 2 more answers
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