S10b
Averages from Tables
Estimate for the Mean
1)
50 hippos were captured over the course of a year and weighed.
The results can be seen in the table, below.
Weight of hippo
in tonnes
Frequency
1.4 < W< 1.7
5
Work out an estimate for the mean weight of a hippo.
Give your answer to 1 decimal place.
1.7 <w< 2.0
2.0 W< 2.3
2.3 < W< 2.6
12
2.6 sw< 2.9
2.9 <W <3.2

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

fwms@lil_ben06

step-by-step explanation: