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lilavasa [31]
2 years ago
10

Fatheya purchased a prepaid phone card for $25. Long distance calls cost 12 cents a minute using this card. Fatheya used her car

d only once to make a long
distance call. If the remaining credit on her card is $22.36, how many minutes did her call last?
Mathematics
1 answer:
Pachacha [2.7K]2 years ago
7 0

Answer:

22 minutes

Step-by-step explanation:

First you take away the original amount away from the remaining amount.

$25 - $22.36 = $2.64

Then you take that number and divide it by the cents per minute.

$2.64 ÷ 12 = 0.22

Then that's your answer!

Her call lasted 22 minutes.

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mckezie's rabbit ears 1/3 of a pound of food each day if mckenzie buys a 20 pound bag of food how many days will she be able to
Elan Coil [88]

Answer:

She can feed her rabbit for 60 days!

Step-by-step explanation:

Turn 20 into a fraction:

\frac{20}{1}

Make sure it has the same denominator:

<em>(Remember: what you do to one side, you must do to the other)</em>

\frac{20}{1} *\frac{3}{3}= \frac{60}{3}

This means that if the rabbit eats 1/3 of a pound a day, she will be able to feed her rabbit for 60 days.

3 0
3 years ago
Given that ∠ABC is bisected by BD→, m∠ABD = (-159 – 12x)°, and m∠DBC = (3x + 96)°, find x and m∠ABC.
laiz [17]
When anything is bisected, the two halves are equal. This means
(-159 - 12x) = (3x + 96)
-255 = 15x . . . . . . . . . . . . . add 12x-96
-17 = x

Then either of the smaller angles is
(3(-17) + 96)° = 45°

angle ABC is twice this value, or 90°.
7 0
3 years ago
What is P versus NP.
katrin2010 [14]

Answer:

Hope this helps...

Step-by-step explanation:

P stands for polynomial time. NP stands for non-deterministic polynomial time. Definitions: Polynomial time means that the complexity of the algorithm is O(n^k), where n is the size of your data (e. g. number of elements in a list to be sorted), and k is a constant.

Now, a German man named Norbert Blum has claimed to have solved the above riddle, which is properly known as the P vs NP problem.

3 0
3 years ago
Read 2 more answers
Solve by completing the square: x^2+15=8x
Nataly_w [17]
<span>x^2+15=8x
</span><span>x^2-8x=-15
x^2  - 2 (x)(4) =-15
adding 16 on both sides
</span>x^2  - 2 (x)(4) +16=-15+16
x^2  - 2 (x)(4) + 4^2=  1

(x-4)^2=1

taking square root on bothsides   x-4 =  +-1
so x-4=1         or x-4=-1
x-5           or x=3

3 0
3 years ago
Demand The demand function for a product is given by
stira [4]

Answer:

x= -\frac{ln [\frac{5P}{8000-P}]}{0.002}

a) x= -\frac{ln [\frac{5*200}{8000-200}]}{0.002} =1027.062 \approx 1027

b) x= -\frac{ln [\frac{5*800}{8000-800}]}{0.002} =293.893 \approx 294

Step-by-step explanation:

For this case we have the following function:

P= 8000 (1- \frac{5}{5 +e^{-0.002 x}})

We can solve for x like this. First we can reorder the expression like this:

\frac{P}{8000} = 1- \frac{5}{5+e^{-0.002x}}

\frac{5}{5+e^{-0.002x}} = 1 -\frac{P}{8000} = \frac{8000-P}{8000}

\frac{40000}{8000-P} = 5 + e^{-0.002x}

Now we can apply natura log on both sids and we got:

ln[\frac{40000}{8000-P} -5] = ln e^{-0.002x}

ln [\frac{5P}{8000-P}] = -0.002x

And if we solve for x we got:

x= -\frac{ln [\frac{5P}{8000-P}]}{0.002}

Part a

For this case we can replace P = 200 and see what we got for x like this:

x= -\frac{ln [\frac{5*200}{8000-200}]}{0.002} =1027.062 \approx 1027

Part b

For this case we can replace P = 800 and see what we got for x like this:

x= -\frac{ln [\frac{5*800}{8000-800}]}{0.002} =293.893 \approx 294

4 0
3 years ago
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