I need to know how to do the problem

Mathematics

1 answer:

Brilliant_brown [7]3 years ago

8 0

9*15=135

15*4.8=72

9*4.8=43.2

135+72+43.2= 250.2ft (Surface Area)

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9*15*4.8=648ft (Volume)

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Hope this helps

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What's 2sin(2theta)=1? Need it for webassign.

lutik1710 [3]

<em>Solve: </em> $2sin(2x) = 1$

Divide both sides by 2.
$sin(2x) = \frac{1}{2}$

Take the sine inverse of both sides:
$2x = sin^{-1}(\frac{1}{2})$
$2x = \frac{\pi}{6}, \frac{5\pi}{6}, 0 \leq x \leq 2\pi$
$x = \frac{\pi}{12}, \frac{5\pi}{12}$

But we know there are more solutions if we extend the domain. In fact, there are infinitely more solutions since the domain of sine is all real x values.
Thus, we can develop a general solution:

For every $\pi$ units, there is another solution for both $\frac{\pi}{12}$ and $\frac{5\pi}{12}$

General solutions:
$x = \pi n + \frac{\pi}{12}, n \in \mathbb{Z}$
$x = \pi n + \frac{5\pi}{12}, n \in \mathbb{Z}$

7 0

3 years ago

20,18,13,17,18 find the mean,median and mode

Degger [83]

<h3>Answer:</h3>

Mean: 17.2

Median: 18

Mode: 18

<h3>Solution:</h3>

Mean: The sum of all observation divided by several observation

20+18+13+17+18=86
86÷5=
17.2

Median:it is the middlemost observation of data arraged in increasing or decreasing order of values

(13,17,18,18,20)
(17,18,18)
(18)

Mode:it is the value that occurs frequently in a set of data

(13 , 17 , 18 , 18 , 20)

Hope it helps

6 0

2 years ago

Read 2 more answers

Which of the following could be the ratio of the length of the longer leg of a 30 60 90 triangle to the length of its hypotenuse

yan [13]

For 30 60 90 triangles, the ratio of the side lengths is
$\frac{1}{2} : \frac{ \sqrt{3} }{2} :1$
where the first is the shorter leg, the second is the longer leg, and the third is the hypotenuse (the longest side that doesn't form a 90 degree angle)

so the ratio of the longer leg to the hypotenuse is <span> $\frac{ \sqrt{3} }{2} :1$
or
</span> $\frac{ \frac{ \sqrt{3} }{2} }{1}$
<span>which equals </span> $\frac{ \sqrt{3} }{2}$