Is this correct please answer someone?

Given : Jennifer got a box of chocolates. the box is a right triangular prism shaped box. it is 7 in long. and the triangular base measure 2in times 3in times 4in.

a = 2

b=3

c=4

To Find : what is the surface area of the box of chocolates?

Solution: The first thing we should know is the area of the triangular base.

Triangular base area:

$A1 =\sqrt{(s * (s-a) * (s-b) * (s-c)) }$

Where, s is the semi-meter of the triangle:

$s =\frac{ (a + b + c) }{ 2}$

a, b, c: sides of the triangle.

Substituting:

s = (2 + 3 + 4) /2=4.5

$A1 = \sqrt{ (4.5 * (4.5-2) * (4.5-3) * (4.5-4))}$

A1 = 2.90

Then, you must know the area of each rectangle associated with each side of the triangular base.

Rectangle area 1: Ar1 = (a) * (l)

Ar1 = (2) * (7)

Ar1 = 14

Rectangular area 2: Ar2 = (b) * (l)

Ar2 = (3) * (7)

Ar2 = 21

Rectangular area 3: Ar3 = (a) * (l)

Ar3 = (4) * (7)

Ar3 = 28

Finally the surface area is: A = Ar1 + Ar2 + Ar3 + 2 * A1

A = (14) + (21) + (28) + 2 * (2.90)

$A = 68.8 inches^{2}$

Hence the surface area of the box of chocolates is

$A = 68.8 inches^{2}$

6 0

2 years ago

You decide to treat your family to dinner. Everyone wants wings, so you open up your Uber Eats app. The bill comes out to $59. 9

Svetlanka [38]

The paid amount including service fee, tip, and tax is $77.987.

<h3>what is the percentage?</h3>

the percentage is value per hundred.

bill value = $59.99

service fee = 3% of $59.99 = 59.99*3/100 = $1.7997

tip = 20% of 59.99 = $11.998

tax = 7 % of $59.99 = $4.1993

total payment = 59.99+1.7997+11.998+4.1993 = $77.987

therefore, the paid amount including service fee, tip, and tax is $77.987.

to get more related to percentage visit:

brainly.com/question/24304697

8 0

2 years ago