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ra1l [238]
3 years ago
12

How do i solve this

Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
3 0
5.\\5^\frac{1}{4}\cdot5^\frac{1}{4}\cdot5^\frac{1}{4}=5^{\frac{1}{4}+\frac{1}{4}+\frac{1}{4}}=5^\frac{3}{4}=\sqrt[4]{5^3}=\sqrt[4]{125}\\\\/\text{used:}\ a^n\cdot a^m=a^{n+m}/\\6.\\\left(5^\frac{1}{4}\right)^6=5^{\frac{1}{4}\cdot6}=5^{\frac{1}{2}\cdot3}=5^\frac{3}{2}=5^{1\frac{1}{2}}=5\sqrt5\\\\/\text{used:}\ (a^n)^m=a^{n\cdot m}/
7.\\5^{-\frac{1}{4}}=\dfrac{1}{5^\frac{1}{4}}=\dfrac{1}{\sqrt[4]5}\\\\/\text{used:}\ a^{-n}=\dfrac{1}{a^n}/\\8.\\5^2\cdot5^\frac{1}{4}=5^{2+\frac{1}{4}}=5^{2\frac{1}{4}}=5^\frac{9}{4}=5^2\sqrt[4]5=25\sqrt[4]5

a^\frac{m}{n}=\sqrt[n]{a^m}
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I need help! ASAP!! please and thank you
Neko [114]

Answer: The walking path around it.

Step-by-step explanation:

Remember the Pythagorean's theorem, for a triangle rectangle with catheti A and B, and with hypotenuse H, we have:

A^2 + B^2 = H^2

or

H = √(A^2 + B^2)

Here, A + B is the total distance for the path, while the hypotenuse is the distance for the bridge

Here we can see that:

A = 1170 ft

B = 520 ft

Then:

H = √( (520 ft)^2 + (1170 ft)^2) = 1280.4 ft

Now, let's compute the costs.

For the bridge, we know that each foot costs $11, then for 1280.4 ft the cost is:

Cost of the bridge = (1280.4)*$11 = $14,084.4

And for the walking path, the cost is $6 per foot, then the total cost of the path is:

Cost of the path = (520 ft + 1170 ft)*$6 = $10,140

We know that the bridge is preferred if it is within the range of $1500 for the path's cost.

This range is:

($10,140 - $1,500, $10,140 + $1,500) = ($8,640, $11,640)

Here we can see that the cost of the bridge does not belong to this range, (is higher) so the option we should recommend is the walking path around.

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