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alexdok [17]
4 years ago
15

A phone company charges a $5 monthly service fee and $0.25 for every minute of long-distance call time. If your telephone budget

is $8.45, what is the maximum number of minutes of long-distance calls you can make? (Round your answer down to the nearest minute.)
Mathematics
1 answer:
VladimirAG [237]4 years ago
3 0
The maximum number is 33. $0.25 multiplied by 4 is $1.00. If you multiply $1.00 by 8, the result is $8.00. If you multiply 8 by 4, since the number of quarters equivalent to $1.00 is 4, the result is 32. The remaining number is 0.45. You can only add 1 more quarter. 32+1=33. Therefore, the answer is 33.
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in the table approximately how much gallons does an average household use every day for showers and for the toliet
Mariana [72]

Answer:

238 gallons

Step-by-step explanation:

81 + 60 + 53 + 44 = 238

5 0
3 years ago
Read 2 more answers
The function g has an inverse. The function g − 1 determines the number of folds needed to give the folded paper a thickness of
Amanda [17]

Answer:

\mathbf{g^{-1} (t) = log _2  \ 20 \ t}

Step-by-step explanation:

Here is the full question

A standard piece of paper is 0.05 mm thick. Let's imagine taking a piece of paper and folding the paper in half multiple times. We'll assume we can make "perfect folds," where each fold makes the folded paper exactly twice as thick as before - and we can make as many folds as we want.

Write a function g that determines the thickness of the folded paper (in mm) in terms of the number folds made, n. (Notice that g(0) 0.05,)

g(n )= (05)2^n

The function g has an inverse. The function g⁻¹ determines the number of folds needed to give the folded paper a thickness of t mm. Write a function formula for g⁻¹).

<u>SOLUTION:</u>

If we represent g(n) with  t;

Then

\mathbf{t = (0.05)2^n} \\ \\ \mathbf{\dfrac{t}{0.05} = 2^n} \\ \\ \mathbf{\dfrac {100 \ t }{ 5} = 2^n} \\  \\ \mathbf{20 t = 2^n}

Taking logarithm of both sides; we have :

\mathbf{log (20 t) = n log 2}    \ \ \    \mathbf{(since  \ ,  log  \ a^b = b \ log \ a) }  \\ \\ \mathbf{n =  \dfrac{log \ 20 t }{log \ 2 }} \\ \\ \mathbf{g^{-1} (t) =  \dfrac{log \ 20 t }{log \ 2 }} \\ \\ \mathbf{g^{-1} (t) = log _2  \ 20 \ t}

4 0
4 years ago
7/8 divided by 2 1/4
Natasha_Volkova [10]
 Division is multiplication by the reciprocal. The reciprocal is when you see what times your fraction equals 1.
Here's your answer. Just simplify now. 
7/8 * 4/9= 28/72
3 0
3 years ago
Read 2 more answers
Write 286,200 in scientific notation.
Paul [167]

Answer:

2.862*10^5

Step-by-step explanation:

First, move the decimal place until you have a number between 1 and 10. If you keep moving the decimal point to the right in 286200 you will get 2.862.

next, since you moved the decimal place to the left 5 times, the xoonent would be a positive 5.

Therefore, the answer is 2.862*10^5

7 0
4 years ago
A circle has a diameter of 4 meters. What is the best approximation of its area? Use 3.14 to approximate for π . 6.28 m² 12.56 m
hram777 [196]
 i would go with 12.56

7 0
4 years ago
Read 2 more answers
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