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frutty [35]
4 years ago
15

Can someone tell the rules for this plz hurry it’s timed

Mathematics
1 answer:
Lina20 [59]4 years ago
7 0

Answer: it is (tan^2x)cos^2x

The 2nd option.

Hope this helps you....


Step-by-step explanation:


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Which of the following correctly uses absolute value to show the distance between −70 and 15?
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Use the distance formula to get your answer. The distance formula is d=sqrt(x2-x1)^2+(x1-y1)^2 Once you plug your coordinates into it, you'll get your answer.
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Forth grade math: What happens to the area of the triangle when one of the dimensions is doubled and halved?
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\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ b=\stackrel{doubled}{2b} \end{cases}\implies A=\cfrac{1}{2}(2b)(h)\implies \stackrel{\textit{twice as the original area}}{A=bh} \\\\[-0.35em] ~\dotfill

\bf \textit{area of a triangle}\\\\ A=\cfrac{1}{2}bh~~ \begin{cases} b=base\\ h=height\\[-0.5em] \hrulefill\\ h=\stackrel{halved}{\frac{h}{2}} \end{cases}\implies A=\cfrac{1}{2}b\left( \cfrac{h}{2} \right)\implies \stackrel{\textit{half of the original area}}{A=\cfrac{1}{2}bh\left( \cfrac{1}{2} \right)}

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4 years ago
0.6 can be written as the fraction
natulia [17]

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0.6 = \frac{6}{10}

5 0
3 years ago
Read 2 more answers
You measure the lifetime of a random sample of 64 tires of a certain brand. The sample mean is x¯=50 months. Suppose that the li
Anni [7]

Answer:

(48.3875, 51.6125)

Step-by-step explanation:

At 99% level of significance

\alpha=1-0.99=0.01

Z_{a\lpha /2}=0.01/2=0.005

From the normal standard deviation table Z_{a\lpha /2}=2.33

Considering that

\bar x ± Z_{a\lpha /2} \frac {\sigma}{\sqrt{n}}=50±2.33\frac {5}{\sqrt {64}}

50±2.33(0.625)=50±1.6125=(48.3875, 51.6125)

Therefore, there’s 99% confidence that the mean lifetime of a certain brand of tires is between 48.3875 and 51.6125

3 0
3 years ago
A new airport is in its planning phase. One particular challenge is that there are several tall buildings in the vicinity. In pa
mixer [17]

Answer:

<em>Could an airplane take off and clear this tall building?  YES</em>

Step-by-step explanation:

<u>Trigonometry</u>

The building and the ground form a right (90°) angle. The path of the airplane (assumed a straight line) completes the right triangle.

The takeoff angle of the plane θ=15° has the height of the building (450 feet) as the opposite side and the horizontal distance from the end of the runway (2500 feet) as the adjacent side.

The tangent of θ is defined as the following ratio:

\displaystyle \tan\theta=\frac{\text{opposite leg}}{\text{adjacent leg}}

\displaystyle \tan \theta=\frac{450}{2500}

\displaystyle \tan \theta=0.18

Calculating the inverse tangent function:

\theta=\arctan 0.18

\theta\approx 10^\circ

This means the angle needed to clear the tall building is about 10° and it's within the maximum airplane's takeoff angle.

Could an airplane take off and clear this tall building?  YES

8 0
3 years ago
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