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butalik [34]
3 years ago
13

Zach read 30 pages of his book in 10 minutes. If he continues at this rate, how long will it take him to read 45 pages?​

Mathematics
1 answer:
Eddi Din [679]3 years ago
6 0

Answer:

The answer is 15 minutes

Step-by-step explanation:

30/10= 3 pages in one minute and then 45/3= 15 minutes

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3x-5+2x=15+4x-5 how do I solve this step by step
bezimeni [28]
3x - 5 + 2x = 15+ 4x - 5
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x = 15 
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Which of the values shown are potential roots of f(x)=3x^3-13x^2-3x+45? Select all that apply
GrogVix [38]
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2 years ago
An oil tank is leaking into a lake at a rate of 0.1 m3/day. The oil slick forms a semicircular disk whose center is at the leak
gregori [183]

Answer:

17.9  m/s

Step-by-step explanation:

Volume of the slick =  0.5 x π r² h--------------------------------- (1)

Where r = radius of slick

           h = thickness of slick, 10⁻⁶m

If 0.5m³ of oil leaked, then the radius of the semicircular slick can be calculated from equation (1)

V  =  0.5 x π r² h

0.5=  0.5 x  π x  r² x 10⁻⁶

r²   =  10⁶/ π

r =     10³/√π

dV/dt =   πrh dr/dt  + 0.5π r² dh/dt----------------------------------- (2)

Asumming the film thickness is constant , equation (2) becomes

dV/dt =   πrh dr/dt-------------------------------- (3)

dV/dt = 0.1m³/day

r=  10³/√π

dr/dt= rate of expansion of the slick

Substituting  into (3);

0.1 =  π x 10³/√π x 10⁻⁶ x dr/dt

dr/dt = 0.1  x 10⁶/ ( π x 10³/√π)

       =  17.9479 m/s

       ≅  17.9  m/s

8 0
3 years ago
Can someone help me
MArishka [77]

Answer:

ok

Step-by-step explanation:

9+10=21

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3 years ago
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