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Maru [420]
3 years ago
10

3=2/6*4+b solve for b

Mathematics
2 answers:
defon3 years ago
7 0

Answer:

1 2/3

Step-by-step explanation:

If you do the things in the order which would be 2/6*4 (because that is how the order of operations would be) that equals 1 1/3 in fractions.  So to get to B, you need to find what equals 3 so you would do 3- 1 1/3 and that would give you 1 2/3.

cricket20 [7]3 years ago
7 0

3=2/6*4+b

3=4/3+b

3-4/3=b

B=2 2/3

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A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 32 grams. Rounding to
s2008m [1.1K]

Answer:

Part 1 : A=250 e^{-0.008223t}

Part 2 : Half life is 84 minutes ( approx )

Step-by-step explanation:

Part 1 : Suppose the function that shows the amount( in grams ) of the substance after t minutes,

A=A_0 e^{kt}

If t = 0 min, A = 250 grams,

250=A_0 e^{0}

\implies A_0 = 250

If t = 250, A = 32 grams,

32 = A_0 e^{250k}

32 = 250 e^{250k}

0.128 = e^{250k}

Taking ln both sides,

\ln(0.128) = 250k

\implies k =\frac{\ln(0.128)}{250}=-0.008223

Hence, the equation that shows this situation,

A=250 e^{-0.008223t}

Part 2 : If A = 250/2 = 125,

125 = 250 e^{-0.008223t}

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Taking ln both sides,

\ln(0.5) = -0.008223t

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8 0
3 years ago
Y&lt; 3x + 6<br> Determine if (2,4) is a solution
kap26 [50]

Answer:

Yes

Step-by-step explanation:

4 < 3(2) + 6

4< 6+6

4 < 12

3 0
2 years ago
Read 2 more answers
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