A liter of water contains about (first image) molecules. A certain river discharges about (second image) L of water every second. About how many molecules does the river discharge every minute? Write your answer in scientific notation.

Work Shown:

1 second = 2.3 * 10^7 liters of water

60*1 second = 60*2.3* 10^7 liters of water

60 seconds = 138 * 10^7 liters of water

1 minute = (1.38 * 10^2) * 10^7 liters of water

1 minute = 1.38 * (10^2*10^7) liters of water

1 minute = 1.38 * 10^(2+7) liters of water

1 minute = 1.38 * 10^9 liters of water

The river discharges 1.38 * 10^9 liters of water per minute.

1 liter = 3.35 * 10^25 molecules

1.38 * 10^9*1 liter = 1.38 * 10^9*3.35 * 10^25 molecules

1.38 * 10^9 liters = (1.38*3.35) * (10^9*10^25) molecules

1.38 * 10^9 liters = 4.623 * 10^(9+25) molecules

1.38 * 10^9 liters = 4.623 * 10^34 molecules

1 minute = 4.623 * 10^34 molecules

Every minute, about 4.623 * 10^34 molecules of water are discharged from the river.

answer:

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

explanation:

service only with 20% tip  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the  

service

−−−−−−  

so technically the answer is  

→

$

72.6

(

1

+

20

100

)

=

$

87.12

however, the intention of the question provider may have been that your answer is to be  

$

87.12

(

1

+

8

100

)

=

$

94.09

to 2 decimal places.

'

payment just for service  

→

$

87.12

payment for service including tax

→

$

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge  

.

→

$

72.60

20% tip  

20

100

×

$

72.60

=

$

14.52

−−−−−−  

←

add

$

87.12

tax  

8

100

×

$

87.12

=

$

6.97

−−−−−  

←

add

$

94.09

related questions

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.