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Firlakuza [10]
3 years ago
7

Express 80 miles per hour in kilometers per hour

Mathematics
2 answers:
Anna [14]3 years ago
8 0
80 miles per hour is 128.74752 kilometers per hour
nataly862011 [7]3 years ago
5 0
It is 128.748 kilometers per hour
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Just keep in mind that the pie is 3.14
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3 years ago
If construction costs are $160,000 per kilometer, find the cost of building the new road in the figure
MAVERICK [17]

Answer:

$4,160,000

Step-by-step explanation:

First, find the length of the new road in km using Pythagorean Theorem.

According to Pythagorean Theorem:

c² = a² + b²,

Where, c is the longest leg, which is the hypotenuse, a and b are the 2 other legs of the ∆.

Since we are calculating the lenght in km, convert each lenght of the two legs of the ∆ into km.

1 km = 1,000 m

10,000 m = 10 km

24,000 m = 24 km

c² = 24² + 10²

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c² = 676

c = √676

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Lenght of the new road = 26 km

If cost of construction is $160,000 per kilometer, therefore, cost of constructing 26 km road = 160,000*26 = $4,160,000

7 0
3 years ago
It's from the chapter : "exponents and powers"<br>i need the workings too<br>please help​
labwork [276]

Answer:

505/19

Step-by-step explanation:

Easy

so [3^3-(1/2)^(-3)*(1/19)]

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3^3-8/19

3^3=27

27-8/19

convert element to fraction

(27*19)/19-8/19

combine

(27*19-8)/19

505/19

Have a wonderful day ask me if you have more questions about MATH that goes for anyone who needs math help

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Describe how to decide if 94 is a prime or composite number
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If 94 has any other factors other than 1 and itself it is a composite number if it has only 1 and itself then it is prime
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3 years ago
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