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2 years ago

15

You would like to buy a necklace as a graduation gift for your brother.

2 answers:

timofeeve [1]2 years ago

7 0

Answer:

$36 a month

Step-by-step explanation:

Kazeer [188]2 years ago

3 0

Answer:

$36

Step-by-step explanation:

you would have to save $36 a month to have enough money in 6 months to buy the necklace.

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A pollster uses a computer to generate 500 random numbers and then interview the voters corresponding to those numbers. identify

Bond [772]

Answer: D. Simple Random Sampling

Step-by-step explanation: When selection is made or based on chance which is equal or the same for all members within a population. In the scenario described above, there is no prior shuffling, arrangement or segregation of members within the population into groups or subgroups, rather the interviewed voters were chosen at random directly from within the larger population based on equal chance. Therefore voters already have their numbers, then using a random number generator, voters whose number corresponds were interviewed is a clear scenario of simple Random Sampling.

4 0

3 years ago

A 3 cm 2 cm rectangle sits inside a circle with radius of 4 cm.

Ipatiy [6.2K]

Answer:

44.24 cm squared

Step-by-step explanation:

3.14*4^2=50.24

3*2=6

50.24-6=44.24

hope this helps

7 0

3 years ago

To estimate the mean score μ of those who took the Medical College Admission Test on your campus, you will obtain the scores of

chubhunter [2.5K]

<span>Standard deviation for mean of n objects = (square root n) x s.d. for one
object.

So you need (2.8/0.5)^2 or around 32.</span>

4 0

3 years ago

You stand a known distance from the base of the tree, measure the angle of elevation the top of the tree to be 15â—¦ , and then

gogolik [260]

Answer:

The maximum possible error of in measurement of the angle is $d\theta_1 =(14.36p)^o$

Step-by-step explanation:

From the question we are told that

The angle of elevation is $\theta_1 = 15 ^o = \frac{\pi}{12}$

The height of the tree is h

The distance from the base is D

h is mathematically represented as

$h = D tan \theta$ Note : this evaluated using SOHCAHTOA i,e

$tan\theta = \frac{h}{D}$

Generally for small angles the series approximation of $tan \theta \ is$

$tan \theta = \theta + \frac{\theta ^3 }{3}$

So given that $\theta = 15 \ which \ is \ small$

$h = D (\theta + \frac{\theta^3}{3} )$

$dh = D (1 + \theta^2) d\theta$

=> $\frac{dh}{h} = \frac{1 + \theta ^2}{\theta + \frac{\theta^3}{3} } d \theta$

Now from the question the relative error of height should be at most

$\pm p$ %

=> $\frac{dh}{h} = \pm p$

=> $\frac{1 + \theta ^2}{\theta + \frac{\theta^3}{3} } d \theta = \pm p$

=> $d\theta = \pm \frac{\theta + \frac{\theta^3}{3} }{1+ \theta ^2} * \ p$

So for $\theta_1$

$d\theta_1 = \pm \frac{\theta_1 + \frac{\theta^3_1 }{3} }{1+ \theta_1 ^2} * \ p$

substituting values

$d [\frac{\pi}{12} ] = \pm \frac{[\frac{\pi}{12} ] + \frac{[\frac{\pi}{12} ]^3 }{3} }{1+ [\frac{\pi}{12} ] ^2} * \ p$

=> $d\theta_1 = 0.25 p$

Converting to degree

$d\theta_1 = (0.25* 57.29) p$

$d\theta_1 =(14.36p)^o$

4 0

3 years ago

Simplify 4a + 5a + 6b + 3b

Katarina [22]

Step-by-step explanation:

4a + 5a + 6b + 3b

=9a + 9b

= 9(a+b)

6 0

3 years ago