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3 years ago

What is 7 5/8 - 4 2/8

Mathematics

2 answers:

joja [24]3 years ago

7 0

Ok so let's start by the basic, 7-4 is 3,and 5-2 is 3.The denominator stays the same so you're left with, 3 3/8

german3 years ago

7 0

First, subtract the whole numbers, because in this scenario, you can.
7-4 is 3
5/8-2/8 is 3/8
Now put them together
The answer is 3 3/8

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3 years ago

Consider a tank used in certain hydrodynamic experiments. After one experiment the tank contains liters of a dye solution with a

Alja [10]

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Step-by-step explanation:

Here is the complete question

Consider a tank used in certain hydrodynamic experiments. After one experiment the tank contains 200 liters of a dye solution with a concentration of 1 g/liter. To prepare for the next experiment, the tank is to be rinsed with fresh water flowing in at a rate of 2 liters/min, the well-stirred solution flowing out at the same rate.Find the time that will elapse before the concentration of dye in the tank reaches 1% of its original value.

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Let Q(t) represent the amount of dye at any time t. Q' represent the net rate of change of amount of dye in the tank. Q' = inflow - outflow.

inflow = 0 (since the incoming water contains no dye)

outflow = concentration × rate of water inflow

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Q'/Q = -1/100

∫Q'/Q = ∫-1/100

㏑Q = -t/100 + c

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$Q(0) = 200 = Ae^{(-0/100)} = Ae^{(0)} = A\\A = 200.\\So, Q(t) = 200e^{(-t/100)}$

We are to find t when Q = 1% of its original value. 1% of 200 g = 0.01 × 200 = 2

$2 = 200e^{(-t/100)}\\\frac{2}{200} = e^{(-t/100)}$

㏑0.01 = -t/100

t = -100㏑0.01

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4 years ago

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rusak2 [61]

Answer:

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3 years ago