3 years ago

CAN SOMEONE HELP ME SOLVE THIS! WILL GIVE BRAINLEST

Mathematics

1 answer:

liberstina [14]3 years ago

5 0

the answer you are lookig for is c.

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If the arc length of a sector in the unit circle is 4.2, what is the measure of the angle of the sector

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S = rθ
4.2 = 1*θ

The central angle (θ) is 4.2 radians.

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3 years ago

Sam wants to get at least an 80% average in his class. He knows that his teacher plans to give five test this marking period. Hi

vesna_86 [32]

Same would need to get at least a 95% on the next test, if he would like to receive a total average of an 80%

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The speed of cars on a stretch of road is normally distributed with an average 51 miles per hour with a standard deviation of 5.

Oliga [24]

Answer: 0.57

Step-by-step explanation:

Given : The speed of cars on a stretch of road is normally distributed .

Population Mean = $\mu=51\text{ miles per hour}$

Standard deviation : $\sigma= 5.9\text{ miles per hour}$

Let x be the random variable that represents the speed of cars on a stretch of road .

z-score : $z=\dfrac{x-\mu}{\sigma}$

For x= 50.

$z=\dfrac{50-51}{5.9}\approx-0.17$

By using the standard normal distribution table ,

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$P(x>50)=1-P(x\leq50)=1-P(z\leq-0.17)\\\\=1- 0.4325051=0.5674949\approx0.57\\$

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3 years ago

Write 115.9% as a fraction

Lemur [1.5K]

$1 \ \% = \frac{1}{100}\\ \\115.9 \ \%= 115.9 *\frac{1}{100}=\frac{115.9}{100} *\frac{10}{10}=\frac{1159}{1000}$

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3 years ago

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At the grocery store, 4 pints of ice cream cost $7.32. How much would 20 pints of ice cream cost?

sukhopar [10]

Answer:

$36.6 for 20 pints of ice cream

Step-by-step explanation:

4 pints = $7.32.

20 pints = ?

you need to cross multiply or you can just multiply $7.32. with 5.

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2 years ago