tieragroff
18.07.2019 •
Mathematics
As shown in the figure a cylindrical glass contains water a metal sphere of diameter 2 cm is immersed in it find the volume of the water.
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Ответ:
find the volume of a cylinder with height=30 cm
volume of a cylinder=pi*r²*h
r=14/2> r=7 cm
h=30 cm
so
volume =pi*7²*30> 4615.8 cm³
step 2
find the volume of a sphere
volume sphere=(4/3)*pi*r³
r=2/2> 1 cm
volume sphere=(4/3)*pi*1³> 418.67 cm³
step 3
find the volume of water
volume of water=volume of a cylinder-volume of a sphere
volume of water=4615.8-418.67> 4197.13 cm³
Ответ:
In this exercise is given the equation of a line and a point, and is asked to find the equation of the line that is perpendicular to the given one, and that passes through the given point.
The slope of the given line is -4, which means that the slope of a line perpendicular to this one, needs to be 1/4. Now you need to find the value of b or the y-intercept by substituting the given point into the formula y=mx+b, where letter m represents the slope.
y=mx+b Substitute the values of the given point and slope
5=1/4(4)+b Combine like terms
5=1+b Subtract 1 in both sides to isolate b
4=b
The equation of the line perpendicular to y=-4x+9 and that passes through the point (4,5) is y=1/4+4.