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RUDIKE [14]
2 years ago
12

Evaluate a^2b^2? when a = 5 and b = 3.

Mathematics
1 answer:
kvasek [131]2 years ago
5 0

Answer:

D) 7

Step-by-step explanation:

a^{2} -2b^{2}

a=5

b=3

\left(5\right)^2-2\left(3\right)^2

Calculate 5 to the power of 2 and get 25:-

25-2\times 3^{2}

Calculate 3 to the power of 2 to get 9 and then multiply 2 and 9 to get 18:-

25-18

=7

<u>OAmalOHopeO</u>

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5/2 or 2.5
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6 0
3 years ago
What is the surface area of the cylinder shown below? Use 3.14 for π. A. 660 cm2 B. 863 cm2 C. 353.25 cm2 D. 785 cm2
lesantik [10]

Answer:

602.88cm²

Step-by-step explanation:

Find the image of the cylinder attached

Surface area of a cylinder = A=2πrh+2πr²

r is the radius = 4cm

Height h = 20cm

Substitute

A = 2πr(r+h)

A = 2π(4)(4+20)

A = 8π(24)

A = 192π

A = 192(3.14)

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Hence the surface area of the cylinder is 602.88cm²

5 0
3 years ago
Helpppp me pleaseee<br>​
mixer [17]

Answer:

1 st questions answer is  third option

while the answer of other question is  3

Step-by-step explanation:

2nd qestions explanation

put value of x=2 in equation as x-2=0 from equation

(2)^3-6(2)^2+a2+10=2

8-24+a2+10=0

2a=-18+24

2a=6

a=3

3 0
3 years ago
A​ mega-discount chain store just opened a new clothing store in town emphasizing mainly​ women's clothing. Before​ opening, man
Georgia [21]

Answer:

a) Cluster sampling

Step-by-step explanation:

<em>Since here the population is divided into many groups (cluster) and one of these groups is taken as a sample. This type of sampling is called Cluster Sampling.</em>

Further,

In Cluster Sampling the population is distributed into a distinct group called cluster and clusters are chosen as a sample then it is Cluster Sampling.

Multistage Sampling is a complex form of Cluster Sampling. In this sampling population is divided into a different group then one or more groups are randomly selected then again that selected group is divided into a different small group and again one or more these small groups are randomly selected as sample. This process is done many times.

If the sampling is done by any criteria then this type of sampling method is called Systematic Sampling. Like observer is taken every 5th unit as a sample.

If the whole population is divided into many groups(strata) such that between the group units are heterogeneous and within the group units are homogeneous then units are randomly selected from these groups. This type of sampling is called Stratified Sampling.

7 0
3 years ago
The rate is $19 for the first five lines, and $7.75 for each additional line. how much is to post a 8 line ad
o-na [289]

Answer:

41.5

Step-by-step explanation:

So you see the first five lines are for 19 dollars.

Multiply 7.75 by 3 since there are 3 additional lines. (Answer: 23.25)

Add 19 and 23.25 together. (Answer: 42.25)

My calculator work will be posted below for reference.

Unit Name: Two-Step Equations

<h2><u><em>If you need any more help or explanation, follow up in the comments below! :P</em></u></h2>

6 0
3 years ago
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