3 years ago

Ida paid 75¢ for two iteams and got 19¢ in change. What iteams did she buy

Mathematics

2 answers:

qaws [65]3 years ago

5 0

You could buy the Magnet and the Postcard and get 19 cents!

Ronch [10]3 years ago

3 0

She brought the magnets i think

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irina [24]

Answer:

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Step-by-step explanation:

Let r be the radius of cone and h be the height of cone

$\frac{dr}{dt}=2 in/s$

$\frac{dh}{dt}=-4 in/s$

We have to find the rate at which the volume of cone changing when r=10 in and h=20 in

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Differentiate w.r.t t

$\frac{dV}{dt}=\frac{1}{3}\pi (2rh\frac{dr}{dt}+r^2\frac{dh}{dt})$

Substitute the values

$\frac{dV}{dt}=\frac{1}{3}\pi(2\times 10\times 20\times 2+(10)^2\times (-4))$

$\frac{dV}{dt}=\frac{1}{3}\pi(400)=\frac{400}{3}\pi in^3/s$

Hence, the volume of cone changing at rate $\frac{400}{3}\pi in^3/s$

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3 years ago

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Shtirlitz [24]

Answer:

the variable is "b"

Step-by-step explanation:

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3 years ago

!!NEED HELP ASAP PLZ!!

Jet001 [13]

Answer:

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katrin2010 [14]

Answer:

x=3

Step-by-step explanation:

5x+9 = 24

Subtract 9 from each side

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3 years ago

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3 years ago