The trapezoid is composed of a rectangle and two triangles. What is the area of the rectangle? What is the total area of the triangles? What is the area of the trapezoid?

area of rectangle: 70 cm squared

area of one triangle: 14 cm squared

area of both triangles: 28 cm squared

area of trapezoid: 98 cm squared

triangles: 28 cm^2     rectangle: 70 cm^2  trapezoid: 98cm^2

Step-by-step explanation:

The formula for the area of a triangle is base x height x 1/2.

Plug in the dimensions; 4 x 7 x 1/2 = 28 x 1/2 = 14 cm ^2 Since there are 2 triangles, you need to multiply the are of the triangle by 2. This becomes a total of 28 cm^2

The formula for the area of a rectangle is length x width.

Plug it in; 7 x 10 = 70 cm^2

To find the trapezoid's area, just add the two areas, giving you 98 cm^

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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