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BartSMP [9]
2 years ago
7

Which phrase describes an unknown or changeable quantity? A. 60 seconds multiplied by 5 B. 2 times the number of pages in the bo

ok C. 15 years of schooling D. 3 dollars and 76 cents
Mathematics
2 answers:
Anna [14]2 years ago
8 0
A.) cause you can’t take away or add seconds
Zepler [3.9K]2 years ago
8 0

The correct answer for APEX is B (2 times the number of pages in the book)

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Which set or sets does the number 15 belong to
DENIUS [597]
Rational,real,integer,whole number,natural number
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3 years ago
F
e-lub [12.9K]
Hope this helps
G=4.

3 0
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
I'd really appreciate it if someone could help me with these square problems :/
adelina 88 [10]
I would but I don’t want to ;/
3 0
2 years ago
Al walks 4 1/2 miles in 3/4 of an hour. How far will he walk if he walks 2 times slower?
Paraphin [41]

Answer:

9

Step-by-step explanation:

7 0
3 years ago
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