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IRINA_888 [86]
2 years ago
6

A glass triangular prism for a telescope is 5.5 inches long. Each side of the prism's triangular bases is 4 inches long and 3 in

ches high. How much glass covers the surface of the prism?
The answer choices are: 75, 76, 77, and 78. This is due tomorrow morning, please help
Mathematics
1 answer:
fiasKO [112]2 years ago
3 0

Answer:

78 square inches

Step-by-step explanation:

It is given that the length of the glass triangular prism for a telescope=5.5 inches, sides of the triangular prism = 4 inches and height =3 inches.

Thus, Surface area of the triangular prism =bh+(s_{1}+ s_{2}+s_{3})H where H is the length of the triangular prism.

SA=(4)(3)+(4+4+4)(5.5)

=12+12(5.5)

=78 square inches.

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Best Answer Gets Brainliest Please help asap
FrozenT [24]
<h2>Answer:</h2>

[1] Area of base = 13 × 13 = 169in².

Area of faces = 4 (1/2 × 13 × 8) = 208in².

Surface area = (169 + 208)in² = 377in².

[2] Area of base = 1/2 × 5.2 × 4.5 = 11.7in².

Area of faces = 3 (√3/4 × 5.2²) = 35.1in².

Surface area = (35.1 + 11.7)in² = 46.8in².

[3] Area of base = 7 × 10 = 70in².

Area of faces = 2(1/2 × 7 × 6) + 2(1/2 × 10 × 4.8)

= 98in².

Surface area = (70 + 98)in² = 168in².

7 0
3 years ago
A ball is shot straight up into the air from the ground with initial velocity of 45ft/sec. Assuming that the air resistance can
Nesterboy [21]
V2^2 = V1^2 - 2gh 

<span>=> 0 = 44^2 - 2 (32.2) h </span>

<span>=> h = 44^2 / 64.4 = 30.062 ft</span>
6 0
3 years ago
Please help the question is attached below
jasenka [17]

Step-by-step explanation:

a)

we have 400 people. that is 10/10 of the whole group.

7/10 of the whole group drink tea. that is

400 × 7/10 = 40 × 7 = 280

that leaves 3/10 of the whole group not drinking tea

400 × 3/10 = 40 × 3 = 120

from the 280 tea drinkers 20% drink at lay e cups of tea each day. that is

280 × 20/100 = 28 × 2 = 56

because 20 out of 100 is the meaning of 20%.

and the remaining 80% of the tea drinkers drink less then 3 cups each day.

280 × 80/100 = 28 × 8 = 224

b)

out of the 400 people 56 drink at least 3 cups of tea each day. that is

56/400 = 7/50

7 0
2 years ago
Help me, cause I'm tuck
r-ruslan [8.4K]

Answer:

The answer would be 1.33 x 10^{4}

Step-by-step

1.28 x 10^{4} = 12800

5 x 10^{2} = 500

12800 + 500 = 13300

13300 = 1.33 x 10^{4} in scientific notation

Hope this helps:)

Sorry, I got the wrong answer earlier but I fixed it:)

8 0
3 years ago
Express 0.8211 in exponent form
Paladinen [302]
I don't know what you mean by exponent form, so I'll put it in scientific notation. 

8.211 x 10^-1
7 0
2 years ago
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