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Tasya [4]
2 years ago
14

The price of a tv was decreased by 20% to £1440. What was the price before the decrease?

Mathematics
1 answer:
grigory [225]2 years ago
7 0

Answer:

€7200

Step-by-step explanation:

20%---------1440

100%----------y

y= 100×1440/20

y= 144000/20

y= €7200

price before decrease= €7200

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2 years ago
A pizza chef begins to spin a constant volume of dough to make a pie by spinning and tossing the dough into the air, such that t
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Answer:

a ) dAt/dt  =  50,24 in/min

dh/dt  =  -  0,125 in/min

Step-by-step explanation:

The area of the top is At :

At = π*r²

a)  Tacking derivatives with respect to time:

dAt/dt  =  2* π*r * dr/dt

At   t  =  t₁      r  = 16 in     and  dr/dt =  0,5

Then

dAt/dt  =  2*3,14*16*0,5   in/min

a ) dAt/dt  =  50,24 in/min

b) The volume of the cylinder is:

Vc =  π*r²*h     ( where h is the heigh of the cylinder )

Tacking derivatives with respect to time

dVc/dt  =  2* π*r*h*dr/dt  +  π*r²*dh/dt

But  dVc/dt  = 0  since the volume remains constant, then:

π*r²*dh/dt  = -  2* π*r*h*dr/dt

r*dh/dt  =  -  2*h*dr/dt

dh/dt  = - 2*0,5*2/16  in/min

dh/dt  =  -  0,125 in/min

4 0
3 years ago
Identify the maximum or minimum value and the domain and range of the graph of the function y = 2(x + 2)2 - 3
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I'm pretty sure the answer is B
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How to solve for quadratic equations with inequalities?
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q, and p

3 0
3 years ago
14 point to brainliest person , HURRY!! PKS
PIT_PIT [208]
I SAY IT THE SECOND OPTION
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Read 2 more answers
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