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Anestetic [448]
3 years ago
14

Find AB B с 10 cm A 14 cm

Mathematics
1 answer:
Dovator [93]3 years ago
8 0

Answer:

formula to find area = (1/2) b h

= (1/2) x Base x Height

substitute the values

= (1/2) x 18 x 12

= 108 cm2

Step-by-step explanation:

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The is the mean score ? A.25.5 B.26 C.
pentagon [3]
So to find the mean you add up all the numbers (or the exam scores) which will get you 212 then you take the number and divide it by the total numbers in the set (how many numbers did you add up?)

212 divided by 8 is 26.5 which would be C. I hope this helps!
5 0
3 years ago
Which linear function is directly proportional?
spayn [35]

Answer:

y=3*2+2

Step-by-step explanation:

y=3*2+2

=3*2=6

=6+2=7

y=7

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3 years ago
The 2010 General Social Survey reported a sample where about 48% of US residents thought marijuana should be made legal. If we w
Sati [7]

Answer:

The sample size is  n  = 600

Step-by-step explanation:

From the question we are told that

    The  sample proportion is  \r  p = 0.48

     The  margin of error is  MOE  =  0.04

Given that the confidence level is 95%  the level of significance is mathematically represented as

        \alpha  =  100 - 95

        \alpha  =  5 \%

        \alpha  =  0.05

Next  we obtain the critical value of  \frac{\alpha }{2} from the normal distribution table , the values is

                   Z_{\frac{\alpha }{2}  } =  1.96

The reason we are obtaining critical value of    \frac{\alpha }{2} instead of    \alpha is because  

\alpha represents the area under the normal curve where the confidence level interval (  1-\alpha) did not cover which include both the left and right tail while  

\frac{\alpha }{2} is just the area of one tail which what we required to calculate the margin of error

Generally the margin of error is mathematically represented as

      MOE  =  Z_{\frac{\alpha }{2} } *  \sqrt{ \frac{\r p(1-  \r p )}{n} }

substituting values

          0.04= 1.96*  \sqrt{ \frac{0.48(1-  0.48 )}{n} }

         0.02041 = \sqrt{ \frac{0.48(52 )}{n} }

         0.02041 = \sqrt{ \frac{ 0.2496}{n} }

          0.02041^2  = \frac{ 0.2496}{n}

           0.0004166 = \frac{ 0.2496}{n}

=>       n  = 600

   

5 0
4 years ago
Find the area of each figure.<br>7<br>19-​
Iteru [2.4K]

Answer:

66.5

Step-by-step explanation:

A=b•h/2

A=19•7/2 19•7=133

A=133/2 133/2= 66.5

A=66.5

5 0
3 years ago
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