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Allushta [10]
3 years ago
13

A road crew is widening a street that is 24 m wide. Their scale drawing says the new street has to be 125% of the width of the o

ld street. How wide should the new street be? A. 19.2 m B. 28 m C. 30 m D. 300 m
Mathematics
2 answers:
Aleonysh [2.5K]3 years ago
6 0

If the street is already 24 m wide, and it is being expanded by 125%, then the correct answer is C. 30 m!

125% simply means 1 1/4.     1/4 of 24 is 6.    So, you have 24 + 6 = 30!

Elanso [62]3 years ago
6 0

Answer:

The correct answer is C: the new street should be 30m wide.

Step-by-step explanation:

This is a simple problem of per-cents. Perhaps the easiest way to do it is to use a basic ‘‘rule of three’’. In this particular case the 100% is the width of the old street, i.e. 24 m; and we want to know the new width, that is 125% of the old street. So,

                   24 ---- 100%

                    x  ----- 125%

To find x we use the formula

x = \frac{24*125}{100} = 3000/100=30

So, the width of the new street is 30m.

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A prime number is one where the only factors of it are 1 and itself.

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Instead of saying something like 11^2, we could write 11*11. Similarly, 5^4 could be written as 5*5*5*5. Though it's a good idea to use exponents so you make the prime factorization more compact and save time.

The '3' without an exponent is the same as 3^1. You'll often see that exponent of 1 left out. Again this is to save time.

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