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3 years ago

What is the value of the expression shown below?

Mathematics

2 answers:

mash [69]3 years ago

8 0

I hope this helps you

7+6.2÷4×1^2^3

7+3×1

10

FrozenT [24]3 years ago

6 0

7+(10-4) divided by 4 x 1/2 3
7+ (6) 2 divided by 4 x 1/2 3
7+(6) 2 divided by 4 x 1/8
7+12 divided by 4 x 1/8
7+ 3 x .38
7+ .38
=
7.38

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-3y-5=10 Show your work please, thank you.

umka21 [38]

Answer:

-5

Step-by-step explanation:

-3y = 10 + 5

-3y = 15

y = - 5

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If the measure of one exterior angle of a regular polygon is 156 degrees , how many sides does the polygon have ?

Burka [1]

Answer:

15 sides

Step-by-step explanation:

with regular polygons it is best to work with the exterior angles since the sum of exterior angles is 360 degrees

one exterior angle = 180 − one interior angle

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no of sides = 360 /24 = 15 s i d e s

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3 years ago

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 6 cubic feet per minute. The dia

Alla [95]

Answer:

$0.2122\text{ ft per min}$

Step-by-step explanation:

Let r be the radius ( in feet ) of the cone,

So, the diameter of the cone = 2 × radius = 2r feet,

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If h represents the height of the cone,

⇒ 2r = 3 × h,

⇒ $r=\frac{3h}{2}$ feet,

∵ Volume of a cone,

$V=\frac{1}{3}\pi R^2 H$

Where,

R = radius, H = height,

Thus, the volume of the given cone is,

$V=\frac{1}{3}\pi r^2 h$

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$=\frac{3}{4}\pi h^3$

Differentiating with respect to t ( time )

$\frac{dV}{dt}=\frac{9}{4}\pi h^2\frac{dh}{dt}$

We have,

$\frac{dV}{dt}=6\text{ cubic ft per min},h=2\text{ feet}$

$6=\frac{9}{4}\pi (2)^2 \frac{dh}{dt}$

$6=9\pi \frac{dh}{dt}$

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Answer:

Step-by-step explanation:

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Answer:

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