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Gekata [30.6K]
3 years ago
9

A 20-foot ladder leans up against the side of a building so that the foot of the ladder is 10 feet from the base of the building

. How far up the
building does the ladder reach? Round your answer to the nearest tenth.
18.1
17.3
15.9
16.4
Mathematics
1 answer:
harina [27]3 years ago
6 0

Answer:

17.3

Step-by-step explanation:

To solve this equation, you need to use the pythagorean theorem which is:

a^{2} +b^{2}= c^{2}

a= length

b= height

c= hypotenuse

First, substitute in your values for the equation:

10^2+b^{2} =20^{2}

Then, use the squares in the equation:

100+b^{2} =400

Then, subtract 100 from both sides to isolate b:

b^{2} =300

Finally, square root both sides to get your answer:

b=17.3205080757

Then round to the nearest tenth which gives you 17.3.

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Answer:

$4.38

Step-by-step explanation:

First, we need to find out how much the item costs with the sales tax. 4.5% is also equal to 0.045. We can multiply 14.95 by 0.045 to get the sales tax. This would end up to be 0.67275 which we can round to 0.67. We can now add 0.67 to 14.95 to get $15.62. Since we gave the cashier a $20 bill we need to subtract 20 by 15.62 to get $4.38.

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Answer:

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