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5 votes
A quarterly telephone bill consist of N$79.15 rental plus 4.7 cents for each dialled unit. Sales tax is added at 15%. What is the total bill for Mrs. Jones who used 915 dialled units?

2 Answers

2 votes
$4.7 Ă— 915 = 4300.5
$4300.5 + 79.15 = 4379.65
15% of 4379.65 = 656.9475
4379.65 + 656.9745 = 5036.6245
Mrs. Jones' Bill was $5036.63
(Rounded to the nearest 1/10)
User TEEBQNE
by
6.8k points
5 votes

Answer:

$140.48

Explanation:

Let x represent dialed units.

We have been given that a quarterly telephone bill consist of $79.15 rental plus 4.7 cents for each dialed unit.

4.7 cents = $0.047

Cost of dialing x units would be
0.047x.

Total cost of dialing x units would be
0.047x+79.15.

Let us find cost of dialing 915 units by substituting
x=915 in above expression.


0.047(915)+79.15


43.005+79.15


122.155

Now, we will find 15% of sales tax as:


122.155* (15)/(100)


122.155* 0.15


18.32325

Total bill:
18.32325+122.155=140.47825\approx 140.48

Therefore, Mrs. Jonas's bill would be $140.48.

User Tao
by
7.3k points
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