What is the measure of

Mathematics

1 answer:

Brrunno [24]3 years ago

7 0

The measurement of angle A is 60. The reason why it’s 60 is because an equilateral triangle has a degree of 180 when you add all 3 sides together. If you multiply 45 x 3= 135. When you multiply 60x3= 180. That’s why B is correct.

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polet [3.4K]

Okay so, you have to think so lets say Kayla bought 30 kilograms of chicken nuggets (k), for $20 (p). You would put t=pk. Because if you change (p) and (k) you will get a different (t).

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3 years ago

A cylinder has a height of 14 centimeters and a radius of 17 centimeters. What is its volume? Use ≈ 3.14 and round your answer

9966 [12]

<h2><u>Answer</u></h2>

Volume = $\sf{\pi r^2 h}$

$= \sf{3.14 \times {17}^{2} \times 14 } = \sf{12704.45~cm^3}$

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2 years ago

A random sample of 28 statistics tutorials was selected from the past 5 years and the percentage of students absent from each on

SVEN [57.7K]

Answer:

Step-by-step explanation:

Hello!

X: number of absences per tutorial per student over the past 5 years(percentage)

X≈N(μ;σ²)

You have to construct a 90% to estimate the population mean of the percentage of absences per tutorial of the students over the past 5 years.

The formula for the CI is:

X[bar] ± $Z_{1-\alpha /2}$ * $\frac{S}{\sqrt{n} }$

⇒ The population standard deviation is unknown and since the distribution is approximate, I'll use the estimation of the standard deviation in place of the population parameter.

Number of Absences 13.9 16.4 12.3 13.2 8.4 4.4 10.3 8.8 4.8 10.9 15.9 9.7 4.5 11.5 5.7 10.8 9.7 8.2 10.3 12.2 10.6 16.2 15.2 1.7 11.7 11.9 10.0 12.4

X[bar]= 10.41

S= 3.71

$Z_{1-\alpha /2}= Z_{0.95}= 1.645$

[10.41±1.645* $(\frac{3.71}{\sqrt{28} } )$ ]

[9.26; 11.56]

Using a confidence level of 90% you'd expect that the interval [9.26; 11.56]% contains the value of the population mean of the percentage of absences per tutorial of the students over the past 5 years.

I hope this helps!

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3 years ago

The circumference is 15pi centimeters. what is the area of the circle in terms of pi.

Alborosie

Answer:

$\pi {r}^{2}$