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neonofarm [45]
3 years ago
13

What is the Surface area of a square pyramid if

Mathematics
1 answer:
Tatiana [17]3 years ago
3 0

SA= 108 m^2 aND the formula for surface area is SA=2bs+b^2

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To find the sale price of an item you have to add the original price plus the discount amount
Orlov [11]

Answer:

True

Step-by-step explanation:

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3 years ago
Factor 16x4 - 4y2<br><br> A) (x + 4y)(x - 4y)<br> B) 4(2x2 + y)(2x2 - y)
Alex73 [517]

Step-by-step explanation:

16 {x}^{4}  - 4 {y}^{2}  \\  {4}^{2}  {x}^{4}  -  {2}^{2} {y}^{2}  \\ {4}^{2}  {x}^{2}  \times  {x}^{2}  -  {2}^{2}  {y}^{2}  \\ (4 {x}^{2}  - 2y)(4 {x}^{2}  - 2y)

6 0
3 years ago
Read 2 more answers
35. In a simple random sample of 25 high school students, the sample mean of the SAT scores was 1450, and the sample variance wa
Tatiana [17]

Answer:

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

Step-by-step explanation:

Information provided

\bar X=1450 represent the sample mean for the SAT scores

\mu population mean (variable of interest)

s^2 = 900 represent the sample variance given

n=25 represent the sample size  

Solution

The confidence interval for the true mean is given by :

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

The sample deviation would be s=\sqrt{900}= 30

The degrees of freedom are given by:

df=n-1=2-25=24

The Confidence is 0.954 or 95.4%, the value of \alpha=0.046 and \alpha/2 =0.023, assuming that we can use the normal distribution in order to find the quantile the critical value would be z_{\alpha/2} \approx 2.0

The confidence interval would be

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

3 0
3 years ago
Identify the similar triangles them find the x
Alex Ar [27]

Answer:

ADB and ABC are similar

x = 8

Step-by-step explanation:

hypotenuse in ADB = \sqrt{4^2 + 2^2 } = \sqrt{20}

since two triangles are similar,

\frac{2+x}{\sqrt{20} } = \frac{\sqrt{20}}{2}

solving for x, x=8

4 0
3 years ago
An athlete earns $350,000 each year. If his team makes the play-offs, he will earn a 15% bonus. What will be his total earnings
Andrews [41]
He will earn $402,500  $350,000 plus a 15% bonus of $52,500
3 0
3 years ago
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