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UkoKoshka [18]
3 years ago
7

Work out the surface area of this cylinder. Please help, I will award brainliest.

Mathematics
1 answer:
gogolik [260]3 years ago
8 0

Answer:

8*16.8 which is 302.4

Step-by-step explanation:

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What underfined geometric term is described a two dimensional set point that has no beginnings or end
yan [13]
It is called a Line. It is a straight path that extends forever
6 0
3 years ago
What is the multiplicative inverse of the number 7?
vagabundo [1.1K]

Answer:

1/7

Step-by-step explanation:

Another word for multiplicative inverse is reciprocal

It is the number  that when multiplied by the original number gives you one

7 * x = 1

Divide by 7

7x/7 = 1/7

x = 1/7

The multiplicative inverse of 7 is 1/7

3 0
3 years ago
Read 2 more answers
If a is a positive integer and b is a negative integer, which expression must be positive?
nydimaria [60]

So, let's solve all of them and see:

a - (-b) = a + b ⇒ can be either positive or negative, depending on the numbers

a + (-b) = a - b ⇒ can either be positive or negative, depending on the numbers

a * (-b) = a * (-b) ⇒ negative answer no matter what

a / (-b) = a / (-b) ⇒ negative answer no matter what


So the answer is:

<em>"None of the above"</em>.


Hope it helped,


BioTeacher101


(If you have any questions, feel free to ask them in the comments)

4 0
3 years ago
Read 2 more answers
Select True or False from each pull-down menu, depending on whether the corresponding statement is true or false.
Schach [20]

Answer:

1) FALSE

2) FALSE

3) TRUE

4) TRUE

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part 1

The mean and standard deviation of a normally distributed random variable which has been standardized are one and zero, respectively.

The mean and the deviation for  the normal standard distribution are:

\mu=0, \sigma =1

So then that's FALSE.

Part 2

Using the standard normal curve, the z−score representing the 10th percentile is 1.28.

We are looking for a value a, that satisfy this:

P(X>a)=0.90   (a)

P(X   (b)  

We can find a z value that satisfy the condition with 0.10 of the area on the left and 0.90 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.10 and P(Z>-1.28)=0.90

So that's FALSE.

Part 3

Let z1 be a z−score that is unknown but identifiable by position and area. If the symmetrical area between −z1 and +z1 is 0.9544, the value of z1 is 2.0

If we find this probability:

P(-2.0< Z

So on this case we can approximate to 0.9544. And that's TRUE.

Part 4

Using the standard normal curve, the z−score representing the 75th percentile is 0.67.

We are looking for a value a, that satisfy this:

P(X>a)=0.25   (a)

P(X   (b)  

We can find a z value that satisfy the condition with 0.75 of the area on the left and 0.25 of the area on the right it's z=0.67. On this case P(Z<0.67)=0.75 and P(Z>0.67)=0.25

So that's TRUE.

3 0
3 years ago
Help me solve this equation. (x-5) =10 where y =3
g100num [7]
X - 5 = 10
   +5 = +5 = 15 

x = 15
5 0
3 years ago
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