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Mumz [18]
2 years ago
11

Waht 6/9 dividede 4/7 plzzzzzzzzzzzzzz help

Mathematics
1 answer:
levacccp [35]2 years ago
5 0

Answer:

6/9 ÷ 4/7 = 1 1/6

Step-by-step explanation:

flip the second fraction and then we simply multiply the numerators with each other and the denominator with each other

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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
3 years ago
What is the sum?<br><br><img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B%20%7Bx%7D%5E%7B2%7D%20%7D%20%20%2B%20%20%5Cfrac%7
shutvik [7]

Answer:

6/x^2

Step-by-step explanation:

Simplify the following:

2/x^2 + 4/x^2

2/x^2 + 4/x^2 = (2 + 4)/x^2:

(2 + 4)/x^2

2 + 4 = 6:

Answer: 6/x^2

8 0
3 years ago
Read 2 more answers
Sammie competes in 14 chess matches. Of those matches, she wins 8. What percent of the matches did Sammie win?
weeeeeb [17]

Answer:

57.1428%

Step-by-step explanation:

8 divided by 14 = 0.57142857142 then turn it to a fraction which you move the period two times to the right thus the answer is

57.1428....

5 0
3 years ago
Find the value of the angle θ rounded to 1 DP.<br><br>Help asap
AveGali [126]
The value of 0 is 20squRed to the dp of 35
8 0
2 years ago
The angle measurements in the diagram are represented by the following expressions.
xxTIMURxx [149]

Answer:

114 degrees

Step-by-step explanation:

6x+12=3x+63

-3x -12 -3x  -12

3x=51

x=17

6(17) +12 = 114

5 0
2 years ago
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