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3 years ago

10

How much of a 15% acid solution must be mixed with a solution containing 35% solution should result in 20 gallons of a 20% solut

ion?

1 answer:

sesenic [268]3 years ago

3 0

I don't know, i should ask you.

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Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te

Eva8 [605]

Answer:

Step-by-step explanation:

As per Newton law of cooling we have temperature of a cooling object at time t is given by

T(t) = $T_s + (T_0-T_s) e^{-kt}$

where $T_s = 76: T_0 = 200$

When t=2.5, we have

$T(2.5) = 76+(100-76)e^{-2.5k} =180\\e^{-2.5k} =\frac{104}{24} =4.333\\k=\frac{ln4.333}{-2.5} =-0.5865$

Hence equation is

$T(t) = 76+24e^{-0.5865t}$

Using this we find that

$130=76+24e^{-0.5862t} \\e^{-0.5862t}=54\\t=1.59559$

i.e. At 1.6 seconds the coffee will reach a temperature of 130 degrees

3 0

3 years ago

A large order of cheesy fries costs $7. How much would it costs to buy three orders of cheesy fries?

Maru [420]

Answer:

21 dollars

Step-by-step explanation:

6 0

3 years ago

For what value of d would the statement 6d = 30 be true?

hram777 [196]

Answer:

b

Step-by-step explanation:

5(6) = 30

6 0

3 years ago

What is exacly 5/6 of a full rotation

solmaris [256]

Full rotation= 360 degrees

360(5/6)= 300 degrees

The answer is 300 degrees.

Hope this helps!

7 0

4 years ago

Read 2 more answers

Is this relation a function?

pishuonlain [190]

Answer:

Yessssssss

Step-by-step explanation:

A function cannot be assigned more than one output for each input. Since each input has one output it is a function

6 0

3 years ago