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3 years ago

Emma needs to divide 7 by 4.

Mathematics

1 answer:

lara [203]3 years ago

5 0

Answer:

D) she can divide 7 by 2

Step-by-step explanation:

As, Division is not same as multiplication, so not the a option

And b doesn't have the right values

C is also wrong bc it have multiplication

So D is right

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Suppose the radius of the sphere is increasing at a constant rate of 0.3 centimeters per second. At the moment when the radius i

elixir [45]

<h2>At the moment when the radius is 24 centimeters, the volume is increasing at a rate of 2171.47 cm³/min.</h2>

Step-by-step explanation:

We have equation for volume of a sphere

$V=\frac{4}{3}\pi r^3$

where r is the radius

Differentiating with respect to time,

$\frac{dV}{dt}=\frac{d}{dt}\left (\frac{4}{3}\pi r^3 \right )\\\\\frac{dV}{dt}=\frac{4}{3}\pi \times 3r^2\times \frac{dr}{dt}\\\\\frac{dV}{dt}=4\pi r^2\times \frac{dr}{dt}$

Given that

Radius, r = 24 cm

$\frac{dr}{dt}=0.3cm/s$

Substituting

$\frac{dV}{dt}=4\pi r^2\times \frac{dr}{dt}\\\\\frac{dV}{dt}=4\pi \times 24^2\times 0.3\\\\\frac{dV}{dt}=2171.47cm^3/min$

At the moment when the radius is 24 centimeters, the volume is increasing at a rate of 2171.47 cm³/min.

4 0

3 years ago

Byron opened a new bank account and immediately started depositing d dollars per week. He also withdrew w dollars per week to pa

topjm [15]

Answer: b i just took the test

Step-by-step explanation:

6 0

3 years ago

Graph the equation 2x+8y=-32

lilavasa [31]

Find x and y intercept and plot
set x to zero and find y
set y to zero and find x
tada, 2 points

if x=0, then y=-4
if y=0, then x=-16
we havee the points
(0,-4) and (-16,0)

or
y=-1/4x-4

7 0

3 years ago

Read 2 more answers

Find the value of x, and please explain how you got x

katen-ka-za [31]

X equals to 48

The work is shown in the picture. I hope this helps.

8 0

3 years ago

Find the values of 3*(* stands for x) and (1/3)*(* stands for x) for different values of x. Values of x are: 1, 2, 3, 4

kumpel [21]

If x=1
1/3x = 1/3
3x = 3

If x=2
1/3x=2/3
3x=6

If x=3
1/3x=1
3x=9

If x=4
1/3x=1 1/3
3x+12

7 0

3 years ago