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adoni [48]
3 years ago
9

A painter is placing a ladder to reach the third story window, which is 23 feet above the ground and makes an angle with the gro

und of 80°. How far out from the building does the base of the ladder need to be positioned? Round your answer to the nearest tenth.
Mathematics
1 answer:
oksian1 [2.3K]3 years ago
4 0

Answer:

69

Step-by-step explanation:

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An oil tank has to be drained for maintenance. The tank is shaped like a cylinder that is 4 ft long with a diameter of 2.2 ft. S
gavmur [86]

Answer:

8\:\mathrm{minutes}

Step-by-step explanation:

The volume of a cylinder is given as:

r^2\cdot\pi\cdot h

Since the diameter is 2.2, the radius is \frac{2.2}{2}=1.1.

Therefore, the volume of this cylinder is:

1.1^2\cdot 3.14\cdot 4=15.1976\:\mathrm{ft^3}, using \pi=3.14 as requested in the problem.

Since the tank is emptied at a constant rate of 1.5\:\mathrm{ft^3\:per\:minute}, it will take

\frac{15.1976}{1.5}=7.5988=\fbox{$8\:\mathrm{minutes}$} to empty the tank.

8 0
3 years ago
Solve by factoring. x² - 121 = 0
densk [106]
The first one is 11 and -11 because when you square them they both get 121
The second one is -7 and -1 
4 0
3 years ago
Explain how you can approximate a cube root when the cube is not a perfect cube.
jenyasd209 [6]

Answer:

See below.

Step-by-step explanation:

It would take a long time to explain . There is a good method called Newton's method which involves graphs of the type

y = x^3 - n and applying calculus to produce cycles of approximation  until you'll get close to the required cubic root.

You'll find it on online videos.

5 0
3 years ago
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OMG i've been struggling for soo long helppp mee
timama [110]

Answer:

WHERE IS THE ANSWER

Step-by-step explanation:

4 0
3 years ago
Describe how you can use compatible numbers to estimate 17x27
Gemiola [76]

Answer:

600

Step-by-step explanation:

all you got to do is 17 goes to what? 20 because its closer. and 27 is closer to 30.

I hope that helps you.

8 0
4 years ago
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