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denis23 [38]
2 years ago
11

2 4/5 x 3 1/8 proper fraction show work

Mathematics
2 answers:
erastovalidia [21]2 years ago
4 0

Answer:

answer is 8 3/4

the formula is in the picture

hope this picture helps

8090 [49]2 years ago
4 0

Answer:

35/4 = 8 3/4 = 8.75

Step-by-step explanation:

14/5 * 25/8 = 14 · 25/5 · 8 = 350/40 = 35 · 10/4 · 10 = 35/4

Multiply both numerators and denominators. Result fraction keep to lowest possible denominator GCD(350, 40) = 10. In the next intermediate step , cancel by a common factor of 10 gives 35/4.

In words - fourteen fifths multiplied by twenty-five eighths = thirty-five quarters.

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An open metal tank of square base has a volume of 123 m^3
snow_lady [41]

Answer:

  a) h = 123/x^2

  b) S = x^2 +492/x

  c) x ≈ 6.27

  d) S'' = 6; area is a minimum (Y)

  e) Amin ≈ 117.78 m²

Step-by-step explanation:

a) The volume is given by ...

  V = Bh

where B is the area of the base, x^2, and h is the height. Filling in the given volume, and solving for the height, we get:

  123 = x^2·h

  h = 123/x^2

__

b) The surface area is the sum of the area of the base (x^2) and the lateral area, which is the product of the height and the perimeter of the base.

S=x^2+Ph=x^2+(4x)\dfrac{123}{x^2}\\\\S=x^2+\dfrac{492}{x}

__

c) The derivative of the area with respect to x is ...

S'=2x-\dfrac{492}{x^2}

When this is zero, area is at an extreme.

0=2x -\dfrac{492}{x^2}\\\\0=x^3-246\\\\x=\sqrt[3]{246}\approx 6.26583

__

d) The second derivative is ...

S''=2+\dfrac{2\cdot 492}{x^3}=2+\dfrac{2\cdot 492}{246}=6

This is positive, so the value of x found represents a minimum of the area function.

__

e) The minimum area is ...

S=x^2+\dfrac{2\cdot 246}{x}=(246^{\frac{1}{3}})^2+2\dfrac{246}{246^{\frac{1}{3}}}=3\cdot 246^{\frac{2}{3}}\approx 117.78

The minimum area of metal used is about 117.78 m².

3 0
2 years ago
Can someone help with me
umka21 [38]

Answer:

yes your answer is 45 degree

8 0
2 years ago
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Find the circumference for the following circle. use 22/7 for pi.
kondor19780726 [428]

Answer:

D.16.5m

because circumference=21/7×5.25

=16.5m

7 0
2 years ago
Help please...........-
vovangra [49]

Answer:c

Step-by-step explanation:

c

8 0
3 years ago
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Help me :) !
m_a_m_a [10]

Answer:

69

Step-by-step explanation:

4 0
2 years ago
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