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Marizza181 [45]
3 years ago
9

-49.239 5.65 What is the sum

Mathematics
2 answers:
katrin [286]3 years ago
5 0

Answer:

i can confirm

the person above is me right...

(i calculated and looked it up to check)

-43.589

hammer [34]3 years ago
4 0
-49.239 + 5.65 = -43.589
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Find each percent change to the nearest percent.
inna [77]

Answer:

1 is a increase

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Step-by-step explanation:

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4 years ago
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Find the area of the circle [?] square units ​
xxMikexx [17]

Answer:

169π or 530.93

Step-by-step explanation:

The formula for the area of a circle is πr²

Here, the radius is given to be 13.

So, let's just plug it into the formula as r

π x 13²

π x 169

169π

The radius is 169π. If you want to multiply out the π you would get 530.93, which is equivalent of course.

4 0
3 years ago
colby and jaquan are growing bacteria in an experiment in a laboratory. Colby starts with 50 bacteria in his culture and the num
kaheart [24]
To get started, we will use the general formula for bacteria growth/decay problems:

A_{f} =  A_{i} ( e^{kt} )

where: 
A_{f} = Final amount
A_{i} = Initial amount
k = growth rate constant
t = time


For doubling problems, the general formula can be shortened to:

kt = ln(2)

Now, we can use the shortened formula to calculate the growth rate constant of both bacteria:

Colby (1):
k_{1} = ln(2)/t
k_{1} = ln(2)/2 = 0.34657 per hour

Jaquan (2):
k_{2} = ln(2)/t
k_{2} = ln(2)/3 = 0.23105 per hour

Using Colby's rate constant, we can use the general formula to calculate for Colby's final amount after 1 day (24 hours).

Note: All units must be constant, so convert day to hours.

A_{f1} = 50( e^{0.34657(24)})
A_{f1} = 204,800

Remember that the final amount for both bacteria must be the same after 24 hours. Again, using the general formula, we can calculate the initial amount of bacteria that Jaquan needs:

A_{f2} = 204,800 =  A_{i2} ( e^{0.23105(24)} )
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3 0
3 years ago
2. What is the factored form of 2x^2 + x – 3?
Darya [45]

Answer:

(2x + 3)(x - 1)

Step-by-step explanation:

(2{x}^{2} + 3x) - (2x - 3) \\ x(2x + 3) -1(2x + 3) \\ \\ (x - 1)(2x + 3)

I am joyous to assist you anytime.

5 0
3 years ago
{5x−y=−21 What is the solution of the system?
Montano1993 [528]

Answer:

Step-by-step explanation:

5x - y = -21

y = 5x + 21

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x + y = -3

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3 years ago
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