1 year ago

Smbody can hp me?……….

Mathematics

1 answer:

TiliK225 [7]1 year ago

6 0

Answer: 20, 140, 240

Step-by-step explanation:

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A concrete column has a diameter of 390 mm and a length of 3 m. If the density (mass/volume) of concrete is 2.45 Mg/m^3, determi

Serhud [2]

Answer:

Step-by-step explanation:

The column has the shape of a cylinder hence the formula for the volume of a cylinder is

$v=\pi r^2h$

Given

diameter d= 390 mm

radius r= 390/2= 195 mm to meter = 0.195 m

length or height h= 3 m

applying the data to the formula we have

$v=\pi *0.195^2*3\\\\ v=\pi*0.0038*3\\\\ v=\pi*0.0114\\\\ v=0.035 m^3$

we can now use the volume in addition with the density given to solve for the mass using the expression for density

density= mass/volume

2.45= mass/0.035

mass= 2.45*0.035

mass= 0.085 mg

We know that weight

w= mass* acceleration

w= 0.085*9.81

w= 0.83 N

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3 years ago

Solve 4 log12 2 + log12 x = log12 96. Choose one answer.. a. x = 88. b. x = 80. c. x = 12. d. x = 7

Allushta [10]

$4log_{12} 2 + log_{12} x = log_{12} 96 \\ log _{12} 2^{4} +log _{12} x = log _{12} 96 \\ log _{12} 16x = log_{12} 96$
16 x = 96
x = 96 : 16 = 6
Answer : D ) x = 6 ( x = 7 is the wrong answer )

5 0

3 years ago

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The point-slope form of the equation of the line that passes through (–9, –2) and (1, 3) is y – 3 = (x – 1). What is the slope-i

Vadim26 [7]

Add and subtract x and ys

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3 years ago

Jasmine bought 6.4 pounds of chewy candy from the local confectionary store. If she gave 2.06 pounds of the candy to her little

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Answer:

4.34 lbs

Step-by-step explanation:

6.4-2.06= 4.34

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3 years ago

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1/8 + 1/4 estimate the sum or difference

stepladder [879]

When estimating you need to round up or down to find something close to the real answer. Here we would round 1/8 down to 0 and 1/4 down to 0. So 0+0=0.

Your estimated answer is 0

The real answer is 3/8 so 0 is close and that is the point in estimating

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3 years ago