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Alex Ar [27]
3 years ago
15

I NEED HELP PLEASE! :)

Mathematics
1 answer:
Mariana [72]3 years ago
5 0

Answer:

A. The volume of the prism = 204.7 cm³

Step-by-step explanation:

The difficult part is finding the hight x in the triangle with sides 6 6 and 7.

The half of the base of this triangle = 3,5

So we have the right sided triangle with a hypothenusa of 6, one right side of 3,5 and one right side which is x (and is unknown).

Use Pythagoras to find the value of x.

x² + (3,5)² = 6²

x² = 6² - (3,5)²

x² = 36 - 12,25

x² = 23.75

x = +- SQRT(23.75)

{Only the positive part has a meaning.}

x = 4.873

So now it is easy.

The area of the triangle = 3.5 * x

with x = 4.873

The area of the triangle = 3.5 * 4.873

The area of the triangle = 17.06 cm²

The volume of the prism = 12 * the area of the triangle

The volume of the prism = 12 * 17.06

The volume of the prism = 204.67

rounded on 1 decimal.

The volume of the prism = 204.7 cm³

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Hello!

You add the amount of sections have red or purple

2 + 2 = 4

Put this over the amount of sections

4 / 10 = 0.4

Multiply this by the amount of times he spins the spinner

180 * 0.4 = 72

The answer is about 72 times

Hope this helps!
8 0
3 years ago
Rank the following methods of timekeeping from most precise to least precise. ANSWER ASAP AND GET BRAINLIEST
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Answer:

Most precise to least precise

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8 0
2 years ago
NEED HELP ON THIS PLEASE! Oregon Trail: Percents.
harina [27]

1845-1846

118->148

148-118 = 30 = change

percent

30/118 ≈ 25.4%

1846-1847

148->139

148-139 = 9 = change

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1847-1848

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Hope this helped :)

5 0
2 years ago
A truck can be rented from Company A for ​$70 a day plus ​$0.20 per mile. Company B charges ​$20 a day plus ​$0.40 per mile to r
Otrada [13]

Answer:

For Company A to have a better deal, the truck must be driven more than 250 miles per day.

Step-by-step explanation:

Given that:

Rent per day of company A = $70

Per mile charges = $0.20

Let,

x be the number of miles.

A(x) = 0.20x + 70

Rent per day of company B = $20

Per mile charges = $0.40

B(x) = 0.40x + 20

For make Company A better deal,

A(x) > B(x)

0.20x+70 > 0.40+20

0.20x-0.40x>20-70

-0.20x>-50

Dividing both sides by -0.20

\frac{-0.20x}{-0.20}>\frac{-50}{-0.20}\\x>250

Hence,

For Company A to have a better deal, the truck must be driven more than 250 miles per day.

8 0
3 years ago
each pail of plaster covers 90 square feet of ceiling. What is the least number of pails of plaster you would need to buy to cov
Dominik [7]
The area of the ceiling:
 A = 14² = 196 ft²
 We need plaster to cover 196 ft².
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 Answer:  We have to buy 3 pails of plaster.
7 0
3 years ago
Read 2 more answers
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