All categories

3 years ago

Check my answer please?! All i did was divide 14.4 by 1/2 Am i correct?

Mathematics

1 answer:

aliina [53]3 years ago

5 0

yes you are correct are you good at counterexample

You might be interested in

V=4/3? r^2 Suppose that, for the sphere in the video, instead of being told how fast the radius is changing, we're told that the

grigory [225]

Answer:

$\frac{dr}{dt}=0.01$ cm per second

$\frac{dS}{dt}=320 square centimeter per secondStep-by-step explanation:We are given that volume of sphere [tex]V=\frac{4}{3}\pi r^3$

Volume of sphere is increasing at a constant rate

$\frac{dV}{dt}=4$ cubic centimeters per second

We have to find the rate of radius at which increasing

when r= 10 cm

Differentiating w.r.t time

$\frac{dV}{dt}=\frac{4}{3}\pi\cdot3r^2\frac{dr}{dt}$

$4=4 r^2\frac{dr}{dt}$

$\frac{dr}{dt}= \frac{1}{r^2}=\frac}{1}{(10)^2}=0.01$ cm per second

Now ,we are given that surface area of sphere

$S=4\pir^2$

Differentiate w.r.t time then we get

$\frac{dS}[dt}=8\pir\frac{dr}{dt}$

$\frac{dS}{dt}=8\pi\times 20\times 2$

$\frac{dS}{dt}=320$ cm per second

5 0

3 years ago

~~!MULTIPLE CHOICE PLEASE HELP!~~

kotegsom [21]

$\huge\mathfrak\red {aNsWeR}$

Equation of straight line in slope form = 》( y-y1) = m (x - x1)

Thus here solving ....

y +3 = -3 (x-4)

=》 y+3= -3x +12

=》 y = -3x +9

option c.) y = -3x +9

6 0

3 years ago

Read 2 more answers

Oaklands zoo has two elephants. The male elephant weighs 3/4 a ton and the female elephant weighs 1/4 of a ton. How much does th

SOVA2 [1]

so if you take away 1/4 from 3/4 you will get 2/4

3/4 - 1/4 = 2/4 or 1/2

so the male elephant weights 1/2 a ton more than the female

8 0

3 years ago

Find y. Round to the nearest tenth. Z 17 ft 8 ft Х 16 ft Y

stealth61 [152]

Answer:

19.75 degrees

Step-by-step explanation:

$cos \: x = \frac{adja}{hypo}$

$cos \: y = \frac{16}{17}$

$y = {cos}^{ - 1} \frac{16}{17}$

$y = 19.75 \: degrees$

6 0

3 years ago

Given that tan θ= -65/72 and that angle θ terminates in quadrant II, then what is the value of cos θ?

adoni [48]

Answer:

cosθ = $-\frac{72}{97}$

Step-by-step explanation:

tanθ = -(65/72)

If it is in the 2nd quadrant, this means that y is positive but x is negative

tanθ= opposite/adjacent or (y/x)

tanθ= $\frac{65}{-72}$

We know that the adjacent value = -72 and the opposite value = 65

The hypotenuse can be get by the following

$\sqrt{(65)^2+(-72)^2} = 97$

cosθ is just adjacent/hypotenuse

Our adjacent value is -72

Our hypotenuse is 97, therefore

cosθ = $-\frac{72}{97}$

7 0

3 years ago