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andrezito [222]
3 years ago
5

Plzzzzz answer this question about density mass and volume!!!!!!!!!

Mathematics
1 answer:
nataly862011 [7]3 years ago
6 0

Answer:

13.896 kg

Step-by-step explanation:

You can find the mass of the bar by first finding the volume.

V = BH

where B = area of the base (the trapezium), and

H = height (distance trapezium between bases)

The area of a trapezium is

A = (b1 + b2)h/2

where b1 and b2 are the lengths of the bases of the trapezium (the parallel sides), and

h = the altitude of the trapezium (distance between the bases of the trapezium)

V = (b1 + b2)h/2 * H

V = (12 cm + 6 cm)(5 cm)/2 * 16 cm

V = 720 cm^3

The volume of the bar is 720 cm^3.

Now we use the density and the volume to find the mass.

density = mass/volume

mass = density * volume

mass = 19.3 g/cm^3 * 720 cm^3

mass = 13,896 g

Now we convert grams into kilograms.

1 kg = 1000 g

mass = 13,896 g * (1 kg)/(1000 g)

mass = 13.896 kg

Answer: 1.3896 kg

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3 years ago
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write the equation of a line that passes through the points (5, -7) and is perpendicular to the line -2x + 6y = -4
VashaNatasha [74]

Answer:

y= -3x + 8

Step-by-step explanation:

Put -2x + 6y = -4 into slope-interceltp form

Take the negative reciprocal of the slope.

Use this reciprocal in point-slope form

and you have,

= y= -3x + 8

<em>(EDITED)</em> Steps:

2x+6y = -4

6y=2x - 4

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if two lines are perpendicular,

m1 * m2 + -1

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the line perpendicular to this line is

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y= -3x + 8

Hope this helps, have a nice day/night! :D

6 0
2 years ago
375,000 in scientific notation
Luba_88 [7]
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Two consecutive integers are added. The square of their sum is 361. What are the integers?
artcher [175]
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uysha [10]

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So the slope of the new line using point (- 1, 2)  is  1/2.

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y = mx + b

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-1 =  1 + b

-2 = b

The line that is perpendicular to y = 1 - 2x  is  y = 1/2x - 2

3 0
2 years ago
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