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The temp fell 3 degrees every hour for 5 hours what's the change in temperature​

Answers

Answer 1
Answer:

Answer:

-15

Step-by-step explanation:

If it fell 3 deg every hour for 5 hours so the equation is 3*5 plus a - sign because it dropped degrees

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A culture started with 5000 bacteria after three hours it grew 6500 bacteria predict how many bacteria will be present after 13 hours round your answer to the nearest whole number

Answers

Answer:

15595 bacteria will be present after 13 hours.

Step-by-step explanation:

Continuous population growth:

The continuous population growth model, for the population after t hours, is given by:

P(t) = P(0)e^(rt)

In which P(0) is the initial population and r is the growth rate.

Started with 5000 bacteria

This means that P(0) = 5000

So

P(t) = 5000e^(rt)

After three hours it grew 6500 bacteria:

This means that P(3) = 6500. We use this to find r.

P(t) = 5000e^(rt)

6500 = 5000e^(3r)

e^(3r) = (65)/(50)

\ln{e^(3r)} = \ln{(65)/(50)}

3r = \ln{(65)/(50)}

r = \frac{\ln{(65)/(50)}}{3}

r = 0.0875

So

P(t) = 5000e^(0.0875t)

How many bacteria will be present after 13 hours?

This is P(13). So

P(13) = 5000e^(0.0875*13) = 15594.8

Rounding to the nearest whole number

15595 bacteria will be present after 13 hours.

10) Solve the inequality to find how many hours until the temperature willbe below 32 degrees F
A)3 hours
B)3.5 hours
C)4 hours
D)4.5 hours
PLS ANSWER

Answers

Answer:

D)4.5 hours

hope this helps

plz mark brainleist

-3x = 24
Solve for X

Answers

-3x = 24
/-3 on both sides
x = -8

HE is 1/3 the length of HG , HE=x-3 and HG=4x-15 find HE

Answers

Answer:

HE=3

Step-by-step explanation:

Equations

With the data provided, we can set up an equation. Then we need to solve the equation. Finally, we use the just-found value of x to calculate HE.

Data:

HE=1/3 HG

HE=x-3

HG=4x-15

Replacing the last two equations in the first:

x-3=1/3(4x-15)

Multiply both sides by 3:

3(x-3)=4x-15

Operate:

3x-9=4x-15

Moving x's to the left and numbers to the right:

3x-4x=-15+9

Joining like terms:

-x=-6

Multiply by -1:

x=6

Since HE= x-3:

HE=6-3

HE=3

Answer:

x=24

Step-by-step explanation:

HE= 1/3(HG)

x-3=1/3(4x-15)

3x-9=4x-15

-x=-24

x=24

Identify the equation that correctly shows the given relationship.

Answers

It’s A he is correct and have a good day

The ratio of boys to girls in a certain school is 5:6. If there are 420 girls, how many boys are there?(put solution)​

Answers

Answer:

I'm not completely sure but I think it's 350

Step-by-step explanation:

5/6 is .8333 then you multiply .8333 by 420 and you get 350
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