There are 8 elephants in the zoo. Each elephant eats about 2.16 × 105 pounds of vegetation per year.

The zookeeper asked Nate and Elena to determine how many pounds of vegetation is required to feed all of the elephants. They wrote their solutions in scientific notation.

Nate's Solution Elena's Solution

8 × (2.16 × 105) 8 × (2.16 × 105)

= (8 × 2.16) × 105 = (8 × 2.16) × (8 × 105)

= 17.28 × 105 = 17.28 × 805

= 1.728 × 106 = 1.728 × 806

Who is correct? Explain.

Nate is very correct while Elena is wrong

Step-by-step explanation:

Please do see the attached for explanation

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

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