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Stolb23 [73]
3 years ago
13

Math

Mathematics
1 answer:
satela [25.4K]3 years ago
6 0

Answer:

Second option, 942cubic units

Step-by-step explanation:

Volume of a cylinder = πr²h

= 3.14 × 10² × 3

= 942cubic units

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Keith wants to save money to purchase a car. He buys an annuity with quarterly payments that earn 2.8% interest, compounded quar
I am Lyosha [343]

Answer: On each, first identify as a Future Value annuity or Present Value annuity. Then answer the question. 1) How much money must you deposit now at 6% interest compounded quarterly in order to be able to withdraw $3,000 at the end of each quarter year for two years?

Step-by-step explanation: hope this helps

6 0
3 years ago
A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is kno
fomenos

Answer: a. 19.200 to 20.800

Step-by-step explanation:

Formula to find the confidence interval(\mu) :-

\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}

, where n is the sample size

\sigma = Population standard deviation.

\overline{x}= Sample mean

z_{\alpha/2} = Two tailed z-value for significance level of \alpha.

Given : Confidence level = 95.44% = 0.9544

Significance level = \alpha=1-0.9544=0.0456

Using standard normal z-value table ,

Two tailed z-value for Significance level of 0.0456 :

z_{\alpha/2}=z_{0.0228}=1.999\approx2

Also,

n=144

\sigma= 4.8

\overline{x}=20

Then, the required 95.44% confidence interval for the population mean :-

20\pm (2)\dfrac{4.8}{\sqrt{144}}\\\\ =20\pm (0.800)\\\\=(20-0.800,\ 20+0.800)=(19.200,\ 20.800)

Hence, the 95.44% confidence interval for the population mean is <u>19.200 to 20.800</u>.

8 0
3 years ago
Lots of questions please help!
Elan Coil [88]
Hi again :)

(3p +2)(5p-1)
Distribute '
(3p)(5p)+(3p)(-1)+(2p=)(5p)+(2)(-1)
15p² - 3p + 10x - 2
15p² + 7p - 2
Thus, the correct option is : C

(5w+2)(8w+5) It says to use the tab, but I don't know :) so I am using my way :)
Distribute
(5w)(8w)+(5w)(5)+(2)(8w)+(2)(5)
40w² + 25w + 16w + 10
40w² + 41w + 10
Thus, The answer is B

Again, I don't know how to solve it by suing the tab. However, I will use my way :)
(-5y+3)(2y+5)
Distribute
(-5y)(2y)+(-5y)(5)+(3)(2y)+(3)(5)
-10y² - 25y + 6y + 15
-10y² - 19y + 15
Thus, the answer is : D

(6x - 5)(2x - 3)
Distribute
(6x)(2x)+(6x)(-3)+(-5)(2x)+(-5)(-3)
12x² - 18x - 10x + 15
12x² - 28x + 15
The answer is : A


For #12 The answer is : C

Now let's solve #13
(4x -6y³)²
Distribute
(4x)(4x)+(4x)(-6y³)+(-6y³)(4x)+(-6y³)(-6y³)
16x² - 24xy³-24xy³+36y^6
36y^6 - 48xy³ = 16x²

The answer is B


wow, that was a lot of work. Good luck!

4 0
3 years ago
A pizza shop runs a special where you can buy a large pizza with one cheese, one veggie, and one meat for $7.00. You have a choi
Dima020 [189]
All you have to do is multiply the numbers- 6, 14, 5, 5, and 3. Your answer would be 6300 variations
8 0
3 years ago
What is 20 x 3 x 8? please help me
Aliun [14]

Answer:

20*3*8 is 480.

Step-by-step explanation:

You must follow the order of operations. You start with 20*3 and get 60 then you multiply 60 and 8 giving you the answer of 480.

6 0
3 years ago
Read 2 more answers
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