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AlladinOne [14]
3 years ago
14

Need the answers to 38-41

Mathematics
1 answer:
Volgvan3 years ago
6 0
38. 8•4 =32cm^2
39. 8+8+5+5=26 cm^2
40. Pi•r*2 so = 28.27in^3
41. 15/2=7.5 so pi•7.5^2 so area is 176.71m^3
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A.) The formula for the volume of a sphere is given below and the relationship between the radius r and the diameter d is r=d/2.
Tasya [4]

Answer:

\displaystyle V=\frac{4}{81}\cdot \pi\ cm^3

Step-by-step explanation:

<u>The Volume of a Sphere </u>

The volume of a sphere of radius r is given by:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot r^3

A. )

If the diameter of the sphere is d, the radius is r=d/2. Substituting:

\displaystyle V=\frac{4}{3}\cdot \pi\cdot \left (\frac{d}{2}  \right )^3

Operating

\displaystyle V=\frac{4}{3}\cdot \pi\cdot \frac{d^3}{8}

Simplifying

\displaystyle V=\frac{1}{6}\cdot \pi\cdot d^3

B.)

The diameter of the sphere is 2/3 cm, thus the volume is:

\displaystyle V=\frac{1}{6}\cdot \pi\cdot \left (\frac{2}{3}  \right )^3

Operating:

\displaystyle V=\frac{1}{6}\cdot \pi\cdot \frac{8}{27}

\displaystyle V=\frac{8}{27}\frac{1}{6}\cdot \pi

\boxed{\displaystyle V=\frac{4}{81}\cdot \pi\ cm^3}

8 0
3 years ago
CAN SOMEONE PLEASE HELP WITH THIS QUESTION ILL GIVE 20 FREE POINTS PLUS BRAINLIEST FOR CORRECT ANSWER !!!
galben [10]

Answer:

  6

Step-by-step explanation:

The overbar means the digit repeats indefinitely. The repeating decimal 0.333... is equivalent to 1/3, so this is the simple addition ...

  3 2/3 + 2 1/3 = 5 3/3 = 6

_____

<em>Comment on the repeating decimal</em>

1/3 = 0.3333... repeating is one of the first decimal equivalents you learn.

__

If you're into repeating decimals. you may have learned how to convert them to fractions:

  x = 0.3333... repeating . . . . . . . give a name to the value

  10x = 3.3333... repeating . . . . . multiply by 10^p where p is the number of digits in the repeating pattern

  10x - x = 3.3333... - 0.3333... = 3 . . . . . subtract: the repeating portions cancel

  9x = 3 . . . . . . . . . .simplify

  x = 3/9 = 1/3 . . . . .divide by the x-coefficient; simplify

4 0
3 years ago
Read 2 more answers
Find the highest common factor [HCF] of 10 and 17
s2008m [1.1K]

Answer

Step by step explanation

7 0
2 years ago
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If x = -1, which equation is true?
docker41 [41]
A. -3(-1) + 7 = 4
3 + 7 = 4
11 = 4 (wrong)

B. 4x - 8 = 12
4(-1) - 8 = 12
-4 - 8 = 12
-12 = 12 (wrong)

C. -2x + 3 = 1
-2(-1) + 3 = 1
2 + 3 = 1
5 = 1 (wrong)

D. 8x + 5 = -3
8(-1) + 5 = -3
-8 + 5 = -3
-3 = -3 (correct!)

So, in conclusion, D is the correct answer.
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3 years ago
I need help on this problem
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Answer:

Total no. of peppers delivered each day=72

Let the total no. of peppers delivered each day be x

5/8 of the peppers are green

\frac{5}{8} x = 45

x =  \frac{45 \times 8}{5}  = 72

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3 years ago
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