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VLD [36.1K]
3 years ago
15

Guo Qi watches 151515 videos on Khan Academy every day. Each video is 888 minutes long on average. For how many days does Guo Qi

need to watch videos on Khan Academy to watch 900090009000 minutes of videos?
Mathematics
1 answer:
lozanna [386]3 years ago
6 0

Answer:

Guo Qi requires 75 days to watch videos on Khan Academy.

Step-by-step explanation:

We are given the following in the question:

Number of videos watched by Guo Qi each day = 15

Average length of each video = 8 minutes

Total minutes of video = 9000 minutes

Total number of videos to be watched =

=\dfrac{\text{Total minutes}}{\text{Average length of video}}\\\\=\dfrac{9000}{8}=1125

Guo Qi needs to watch 1125 videos.

Number of days required =

=\dfrac{\text{Total number of videos}}{\text{Videos watched in one day}}\\\\=\dfrac{1125}{15}=75

Guo Qi requires 75 days to watch videos on Khan Academy.

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Why is using a compass and straightedge and compass better than technology
Dimas [21]

Technology comes from the Greek root \tau \epsilon \chi, meaning art or craft.


For the Greeks, a straightedge and compass was technology.


The nice thing about a straightedge and compass construction of any length is that there's always a corresponding algebraic form consisting of natural numbers combined via addition, subtraction, multiplication, division and square rooting (of positive numbers). So we get an "exact" answer, at least using radicals.


Compare that to the typical calculating technology we use today where the square roots turn into approximations. The calculator is worse, turning an exact answer into an approximation.


Straightedge and compass constructions play a large role in the development of mathematics but they're not really better, it's just how things went. By restricting ourselves to straightedges (linear equations) and compasses (circles, quadratic equations) we restricted the possible lengths we could construct. Understanding exactly how propelled mathematics forward for a couple of thousand years.




3 0
3 years ago
An isosceles triangle has a base of 8 inches and legs measuring 12 inches how wide is the base of a similar triangle with legs m
VARVARA [1.3K]
If the triangles are similar, the base should be 24 inches. The legs on the first triangle are 12 inches. To get 36 inches (the other triangle), we multiply 12 by 3. 12 x 3 = 36. Because you did that to the legs, you must also do it to the base. 8 x 3 = 24. Therefore, the base of the second triangle is 24 inches.
5 0
3 years ago
Sue buys 5 pieces of fabric.Each piece is 1 7/10 yards long.What is the total length of the fabric she buys?One yard of the fabr
Bumek [7]

Answer:

1. 8.5 yards.

2. $42.5

Step-by-step explanation:  

We have been given that Sue buys 5 pieces of fabric. Each piece is 1\frac{7}{10} yards long.

1. To find the total length of fabric bought by Sue we will multiply length of each fabric piece by 5.

\text{Total length of the fabric}=5\times 1\frac{7}{10}\text{ yards}

\text{Total length of the fabric}=5\times \frac{17}{10}\text{ yards}

\text{Total length of the fabric}=\frac{17}{2}\text{ yards}

\text{Total length of the fabric}=8.5\text{ yards}

Therefore, Sue bought 8.5 yards of fabric.

2. 1 yard of fabric costs $5.

So 8.5 yards of fabric will cost : 5*8.5

\text{Total cost of the fabric}=5\times 8.5

\text{Total cost of the fabric}=42.5

Therefore, the cost of total fabric bought by Sue is $42.5.

8 0
3 years ago
Which letter has point symmetry?
svetlana [45]

Answer:

Letters A, M, and T

Step-by-step explanation:

All of these letters have a point of symmetry.

6 0
2 years ago
Read 2 more answers
Someone please tell me what to do
kifflom [539]
For this, we need to find the area of the larger rectangle (The room) and subtract from that the area of the smaller, shaded rectangle (The rug).
A=LW (L=Length, W=Width, A=Area)

The larger rectangle first:
A=(15)(10)
A=150 feet squared

Now the Rug:
A=(12)(7)
A=84 feet squared

Now to find the area that is NOT covered by the rug, we subtract:
150-84
= 66 feet squared will NOT be covered by the rug.

Hope this Helps!
-Sinnamin
4 0
3 years ago
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