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lilavasa [31]
2 years ago
8

After 6 days, the mass m, in grams, of

Mathematics
2 answers:
Likurg_2 [28]2 years ago
7 0

Answer:

3%

Step-by-step explanation:

Sorry I have no step by step explanation at this time.

juin [17]2 years ago
3 0

Answer:

123445

Step-by-step explanation:

125123254125

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Mr. miller has $25 in his savings and wants to put $10 every week into the account. write an equation showing how much money he
iris [78.8K]
The equation you write would be linear, and would be written in slope intercept form y=mx+b. Since Mr. Miller already has $25, we plug that in for "b" in the equation. We plug 10 in for "m", because "x" represents the number of weeks he has been saving. The equation would be y=10x+25. To find how much money Mr. Miller will have in 7 weeks, plug in 7 for x. y=10(7)+25 -> y=70+25 -> y=95 -> $95
7 0
2 years ago
What is the slope of 2x-1=-3y
torisob [31]
I think its -1 i not very smart so it probably wrong


5 0
3 years ago
Read 2 more answers
Subtract 5 and 3 1/3
Ostrovityanka [42]

Answer:

-2 2/3

Step-by-step explanation:

I am pretty sure

5 0
2 years ago
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An object is heated to 100°. It is left to cool in a room that
stepladder [879]

Answer:

Step-by-step explanation:

Use Newton's Law of Cooling for this one.  It involves natural logs and being able to solve equations that require natural logs.  The formula is as follows:

T(t)=T_{1}+(T_{0}-T_{1})e^{kt} where

T(t) is the temp at time t

T₁ is the enviornmental temp

T₀ is the initial temp

k is the cooling constant which is different for everything, and

t is the time (here, it's in minutes)

If we are looking first for the temp after 20 minutes, we have to solve for the k value.  That's what we will do first, given the info that we have:

T(t) = 80

T₁ = 30

T₀ = 100

t = 5

k = ?

Filling in to solve for k:

80=30+(100-30)e^{5k} which simplifies to

50=70e^{5k} Divide both sides by 70 to get

\frac{50}{70}=e^{5k} and take the natural log of both sides:

ln(\frac{5}{7})=ln(e^{5k})

Since you're learning logs, I'm assuming that you know that a natural log and Euler's number, e, "undo" each other (just like taking the square root of something squared).  That gives us:

-.3364722366=5k

Divide both sides by 5 to get that

k = -.0672944473

Now that we have a value for k, we can sub that in to solve for T(20):

T(20)=30+(100-30)e^{-.0672944473(20)} which simplifies to

T(20)=30+70e^{-1.345888946}

On your calculator, raise e to that power and multiply that number by 70:

T(20)= 30 + 70(.260308205) and

T(20) = 30 + 18.22157435 so

T(20) = 48.2°

Now we can use that k value to find out when (time) the temp of the object cools to 35°:

T(t) = 35

T₁ = 30

T₀ = 100

k = -.0672944473

t = ?

35=30+100-30)e^{-.0672944473t} which simplifies to

5=70e^{-.0672944473t}

Now divide both sides by 70 and take the natural log of both sides:

ln(\frac{5}{70})=ln(e^{-.0672944473t}) which simplifies to

-2.63905733 = -.0672944473t

Divide to get

t = 39.2 minutes

3 0
3 years ago
WHY ISNT ANYBODY ANSWERING MY QUESTION PS HELP MEEEEE I ALWAYS GIVE BRAINLIEST 5 STARS andddd offer 25 pointsssssssssss plsss he
meriva

Answer:

0.5 I think. because for every 2 on the x axis, it grows 1 on the y axis.

6 0
3 years ago
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