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3 years ago

Help!

Mathematics

2 answers:

BartSMP [9]3 years ago

6 0

Answer:

Arc AB with a chord AB, and Trace a Circular Sector.

Step-by-step explanation:

1. With a Compass, open it a certain opening with the needle in point F, and with a pencil mark it on line. This is B.

2. With a Compass needle in the right end of line (B) mark the A.

3. With a Compass needle in F, mark A.

4. With a Compass needle in F, trace arc AB

With this construction, we have an arc with F, the Focus, Radius FA=FB, and AB perpendicular to F.

5. You can proceed with a Ruler connecting the dots F to A, and F to B and we can have a Circular Sector.

Alja [10]3 years ago

4 0

This is the construction of a perpendicular line to the given line AB using a point F, which does'not lies on the line AB.

The first two steps are constructed. We have to give the next two steps to complete the construction.

Step 3: Using the same radius A and B as centers, draw two arcs below the line AB.

Step 4: The two arcs will intersect at a point. Name that point as 'X'. Join 'F' and 'X'.

Thus, FX is the required perpendicular to the line AB from point 'F'.

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Federico has raised the most. Not only did he raise enough money, but he also raised more than necessary. 11/10>6/7>5/9

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3 years ago

Mr. Bond’s class wanted to estimate the mean mass of Snickers Fun Size bars. They randomly selected 74 bars and recorded the mas

AleksAgata [21]

Step 1: Find the standard error (SE)

The standard error is given by

$SE=\frac{s}{\sqrt[]{n}}$ $\begin{gathered} \text{ Where } \\ SE=\text{ the standard error} \\ s=\text{ the sample standard deviation} \\ n=\text{ the sample size} \end{gathered}$

In this case,

$n=74,s=0.76$

Therefore,

$SE=\frac{0.76}{\sqrt[]{74}}\approx0.0883$

Step 2: Find the alpha level (α)

$\alpha=1-\frac{(\text{Confidence level})}{100}$ $\alpha=1-0.99=0.01$

Step 3: Find the critical probability (P*)

$P^{\prime}=1-\frac{\alpha}{2}$

Therefore,

$P^{\cdot}=1-\frac{0.01}{2}=0.995$

Step 4: Find the critical value (CV)

The critical value the z-score having a cumulative probability equal to the critical probability (P*).

Using the cumulative z-score table we will find the z-score with value of 0.995

Hence,

$CV=2.576$

Step 5: Find the margin of error (ME)

$ME=SE\times CV$

Therefore,

$ME=0.0883\times2.576=0.2275$

Step 6: Find the confidence interval (CI)

$\begin{gathered} CI\text{ is given by} \\ CI=(\bar{x}-ME,\bar{x}+ME) \\ \text{ In this case} \\ \bar{x}=17.1 \end{gathered}$

Therefore,

$CI=(17.1-0.2275,17.1+0.2275)=(16.8725,17.3275)$

Hence there is a 99% probability that the true mean will lie in the confidence interval

(16.8725, 17.3275)

4 0

1 year ago

Two cross roads, each of width Sm, run at right angles through the

Ray Of Light [21]

Answer:

Rs 57750

Step-by-step explanation:

width =5 m

length of first parallel road 70 m

area of first road 70×5=350 sq.m

length of second road 45 m

area of second road =45×5=225 sq.m

area of the common part of cross road with 5 m width that lies at the

center of the park 5×5 = 225 sq.m

area of roads = area of first road +area of second cross road−common area

=(350+225)−25

=575−25

=550sqm

cost of the construction per sq.m =Rs.105

total cost =550×105=Rs 57750

7 0

3 years ago

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FromTheMoon [43]

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4 years ago

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levacccp [35]

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4 years ago