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3 years ago

NEED HELP ASAP|!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

raketka [301]3 years ago

8 0

Answer:

thanks for freepoints

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A recursive rule for a geometric sequence is a1=49;an=3an−1.

dalvyx [7]

I think it should be an= 49x3^(n-1)

3 0

3 years ago

In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu

olya-2409 [2.1K]

Answer:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

Step-by-step explanation:

Information given

$\bar X= 19.6$ represent the sample mean

$\mu$ population mean

$\sigma= 5.8$ represent the population deviation

n=42 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom, given by:

$df=n-1=42-1=41$

Since the Confidence is 0.98 or 98%, the significance would be $\alpha=0.02$ and $\alpha/2 =0.1$ , and the critical value would be $t_{\alpha/2}=2.42$

Replacing we got:

$19.6-2.42\frac{5.8}{\sqrt{42}}=17.43$

$19.6+2.42\frac{5.8}{\sqrt{42}}=21.77$

And the best option for this case would be:

a. (17.5, 21.7)

8 0

3 years ago

If f(x) = x2 + 7, what is the value of f(3)?

Mazyrski [523]

Plug in 3 for f(x)
f(3)=(3)²+7
f(3)=9+7
f(3)=16
Hoped this helped!

3 0

3 years ago

The diagonals of a parallelogram are 24 meters and 40 meters and

Naddika [18.5K]

Answer:

28 m

Step-by-step explanation:

The longer side can be found using the Law of Cosines. The semi-diagonals are of length 12 and 20 m, and the angle between them facing the long side is 180° -60° = 120°.

c^2 = a^2 +b^2 -2ab·cos(C)

c^2 = 12^2 +20^2 -2·12·20·cos(120°) = 144 +400 +240 = 784

c = √784 = 28

The longer side is 28 meters.

8 0

3 years ago

The girls in Lana’s troop set a goal to sell 1,000 boxes of cookies this year. There are 13 girls in the troop. At least how man

tiny-mole [99]

Answer:

77 boxes

Step-by-step explanation:

1000/13= 76.9230769

They can't sell part of a box and a little extra money never hurt any one.

4 0

3 years ago

Read 2 more answers