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GalinKa [24]
2 years ago
12

Which expressions are equivalent to the one below check all that apply 4^3 * 4^x

Mathematics
2 answers:
-Dominant- [34]2 years ago
8 0
The correct answer is B
pishuonlain [190]2 years ago
7 0
4^3 * 4^x = 64 <span>* 4^x
</span>4^3 * 4^x = 4^(3+x)

answer: b. 64 * 4^x and <span>e. </span>4^(3+x)
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8. A substance has a half life of 2.347 minutes.
mina [271]

Answer:

a.) 4 half lives have passed

b) 9.388 minutes

Step-by-step explanation:

Formula for exponential growth / decay is given as:

A=A_0b^{\frac{t}{c}}

Where A is the final population

A_0 is the initial population

b is the growth factor

c is the time taken for the growth 'b'

t is the amount of time

Here, we are given that:

A = 6. 9 grams

A_0 = 110.4 grams

b = \dfrac{1}{2}

c = 2.347 min

To find:

a.) Number of half lives taken for the decay.

b.) Total time in the decay.

Solution:

a.) Number of half lives taken for the decay is nothing but equal to \frac{t}{c}.

Putting the values in the formula, we get:

6.9=110.4\times \frac{1}2^{\frac{t}{c}}\\\Rightarrow 6.9=110.4\times 0.5^{\frac{t}{c}}\\\Rightarrow 0.0625=0.5^{\frac{t}{c}}\\\Rightarrow \dfrac{t}{c} =4

Therefore, the answer is:

<em>4 half lives </em>have passed.

b.) Total time of decay. We have to find the value of t here.

From answer of part a.):

\dfrac{t}{c} =4\\\Rightarrow \dfrac{t}{2.347} =4\\\Rightarrow t =\bold{9.388\ min}

7 0
2 years ago
What is the area of this face?
Paul [167]

Answer: I think it would be 30 ft

Step-by-step explanation: You would do LxW and get the anwer.

7 0
2 years ago
True or False: y = -3x + 4 is an equation that represents a line parallel to the line 3x + 2y = 9.
nevsk [136]
False
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Here is how I solved it and the answer

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3 years ago
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CALCULATOR
Drupady [299]

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Step-by-step explanation:

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