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wlad13 [49]
3 years ago
6

A submarine dove 35 feet per hour for 7 hours. How deep is the submarine if it originally started at 107 ft. below sea level?

Mathematics
2 answers:
andreyandreev [35.5K]2 years ago
6 0
352 ft because its 107+245=352
Strike441 [17]3 years ago
4 0
You are 352 feet below sea level
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Molly is painting a model house and needs to know how much paint she will need. She knows the surface area of the prism is 216 s
mrs_skeptik [129]

Answer:

1. Base of pyramid; 6 in by 6 in

2. Base of prism; Its dimensions are also 6 in by 6 in, located at the bottom of the house and will not be seen, so it does not require painting.

3. twice the area of the square

4. Area = 228 inches squared

Step-by-step explanation:

For question 4, the area Molly needs to paint is found by adding all the surface areas and subtracting the 2 surfaces that will not be painted: base of pyramid and base of prism (outlined in red). According to the picture, these are both squares with 6 by 6 dimensions.

<h3>Step 1. Add all surface areas together</h3>

Prism: 6 surfaces

Surface area = 216 inches sq

  • Front = 6 x 6 = 36
  • Back = 6 x 6 = 36
  • Top = 6 x 6 = 36
  • Bottom (base) = 6 x 6 = 36
  • Side = 6 x 6 = 36
  • Other side = 6 x 6 = 36

Pyramid: 5 surfaces

Surface area = 84 inches sq

  • Bottom (base) = 6 x 6 = 36
  • Front triangle = (6 x 4)/2 = 12
  • Back = (6 x 4)/2 = 12
  • Side = (6 x 4)/2 = 12
  • Other side = (6 x 4)/2 = 12

TOTAL surface area: 216 inches + 84 inches = 300 inches sq

<h3>Step 2. Subtract surfaces that are NOT being painted</h3>

300 - base of pyramid - base of prism

300 - 2(36)

300 - 72

<u>228 inches sq</u>

Hope this helps!

Download pdf
5 0
2 years ago
The value of square root of -9 is not -3 because
andriy [413]

Answer:

The square root of -9 cannot be -3 because -3 squared or -3 times -3 equals 9 not -9.

Hope this helps!

6 0
3 years ago
If 2.5 inches equals 5 miles how far is three inches
EleoNora [17]
I thonk it s 6 miles not sure though :-)
5 0
3 years ago
What is 9.286 as a mixed number
marshall27 [118]
9.286 

[To change to mixed number, count the number of digits after the decimal point. There are 3 digits, so the denominator will be 1000]

9.286 = 9 \frac{286}{1000}

Then we simplify the fraction
(286 ÷ 2)/(1000÷2) = 143/500

Therefore,
9.286 = 9 \frac{286}{1000}
9.286 = 9 \frac{143}{500}

8 0
3 years ago
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5x^{2} + 3x = x^{2} + 7x
Ipatiy [6.2K]
5x^{2} + 3x = x^{2} + 7x\\&#10;4x^2-4x=0\\&#10;4x(x-1)=0\\&#10;x=0 \vee x=1
8 0
3 years ago
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