3 years ago

Katy buys 4 DVDs every 2 weeks. How many DVDs will she buy in 12 weeks?

Mathematics

1 answer:

pychu [463]3 years ago

3 0

24. Owhsianwuwbeiwbwhwvwhwwbjwbejwbesjshej

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The area of a rectangle is 105 square units. Its width measures 7 units. Find the length of its diagonal. Round to the nearest t

mezya [45]

Answer:

16.6

Step-by-step explanation:

The rectangle has an area of 105. It's width is 7.

1: Find the length

$\frac{area}{width}$ =length

$\frac{105}{7}$ = 15

Length=15

2: Pythagorean theorem

$a^{2} +b^2=c^2$

$7^{2}$ + $15^2=c^2$

49+225= $c^2$

275= $c^2$

$\sqrt{275}$ = $\sqrt{c^2\\}$

16.55≈c

Rounded to nearest tenth

16.6

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3 years ago

After multiplying, a calculator screen displays the answer shown below. How would you write this number in standard form? Enter

Aliun [14]

Answer:

$8.234 E14=8.234 \times 10^{14}$

Step-by-step explanation:

The given number is $8.234 E14$

We need to write this number in standard form.

Any no is given in the standard form is given by :

$N=a\times 10^b$

Where

a and b is real no and integer

It means,

$8.234 E14=8.234 \times 10^{14}$

Hence, this is the required solution.

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3 years ago

Based on the graph which of the following statements are true

Gre4nikov [31]

you can't really see the question it's too blurry

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Determine the commutators of the operators a and a+,where a = (x + ip)/2 ^1/2 and a+ = (x - ip)/ 2 ^1/2

Vsevolod [243]

Answer:

Given that:

$a = (\frac{x+ip}{2})^{\frac{1}{2}}$ and $a+= (\frac{x-ip}{2})^{\frac{1}{2}}$

if a , a+ commutator, it obeys $aa^+ = a^+a$

First find:

$aa^+ = (\frac{x+ip}{2})^{\frac{1}{2}} (\frac{x-ip}{2})^{\frac{1}{2}}$

= $(\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}=(\frac{(x)^2+(p)^2}{4})^{\frac{1}{2}}$

Now;

$a^+a =(\frac{x-ip}{2})^{\frac{1}{2}} (\frac{x+ip}{2})^{\frac{1}{2}} = (\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}$

= $(\frac{(x)^2-(ip)^2}{4})^{\frac{1}{2}}=(\frac{(x)^2+(p)^2}{4})^{\frac{1}{2}}$

therefore, $aa^+ = a^+a$ which implies the operators a and a+ are commutators.

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3 years ago

The diameter of a beach ball is 10 inches. How many cubic inches of air can the beach ball hold? Use 3.14 for pie . Round to the

Morgarella [4.7K]

volume = 4/3 x PI x r^3

r = 10/2 =5

V = 4/3 x 3.14 x 5^3 = 523.333

523.3 cubic inches

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3 years ago