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myrzilka [38]
3 years ago
9

Darien is discounting all prices on the sales for 20%. Which expression below represents the price, p, of any item he marks down

Mathematics
1 answer:
Dominik [7]3 years ago
7 0

Answer: C. 0.8p

Step-by-step explanation:

Since Darien is discounting the prices by 20%, the new price will be 80% of the original price, or 0.8 times the original price

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2. The larger circle of an annulus has a diameter of 10 cm, and the smaller circle has a diameter of 7.6 cm. What is the area of
Alik [6]

Answer:

Area = 3.77 cm^2

Step-by-step explanation:

The diagram using the given statement is attached below

Diameter of larger circle is 10 so radius R1 = 10/2= 5

diameter of smaller circle is 7.6, radius (r1)= 3.8

We need to find the area of the shaded region

Area of the circle =\pi r^2

Area of annulus =\pi R1-\pi r1

=\pi (5)-\pi (3.8)

Area = 3.77 cm^2

5 0
3 years ago
A marketing study conducts 60 significance tests about means and proportions for several groups. Of​ them, 3 tests are statistic
Sav [38]

Answer:

hello your question lacks the required options attached is a picture of the complete question

One would expect about 5% of tests to be significant just by chance if the null hypothesis is true, and for 60 tests, this is 0.05(60) = 3 tests. This could explain why these tests are statistically significant.

Step-by-step explanation:

What is misleading about this is the study's final report because this marketing study was carried out with a level of significance of 5% (0.05) which means that if we carry the same study with varying sample data we will mostly like arrive at a conclusion against our null conclusion 5% of the time and this is not good for the the study because it is a type 1  error and has to be eliminated and it cannot be eliminated totally .

hence  One would expect about 5% of tests to be significant just by chance if the null hypothesis is true, and for 60 tests, this is 0.05(60) = 3 tests. This could explain why these tests are statistically significant.

8 0
3 years ago
Read 2 more answers
A family of four want to go on a cruise around the Mediterranean. They ask for details about cabins on the ship. Cabin Price per
aleksley [76]

Answer:

£126

Step-by-step explanation:

From the question, Cabin price is given as:

Cabin Price Per person

Inside £439

Outside £499

Balcony £565

Suite £869

How much more is a cabin with a balcony than an inside cabin?

Per person,

This is calculated as:

£565 - £439

= £126

5 0
3 years ago
Every morning Sasha exercises for 20 minutes. She exercises k minutes every evening. Next week she will double her exercise time
lapo4ka [179]
If k=20 minutes
Each day Sasha will exercise 2 times more. 2 times more than k is 2k.
So first week Sasha will exercise k+2k+3k+4k+5k+6k=20+40+60+80+100+120=440 minutes
The formula to show how long Sasha will exercise each day next week is:
440 + 20*x
where 440 is initial exercise time, and x is number of day in next week.
8 0
4 years ago
A scalar and matrix multiplication problem
pentagon [3]

Answer:

\left[\begin{array}{ccc}-32\\4\\20\\-36\end{array}\right]

Step-by-step explanation:

The product of a scalar times the matrix involves the product of that scalar times each of the elements of the matrix, resulting on the multiplication by "-4" of each of the four elements as shown below. These new product values end up being the new matrix elements.

-4*\left[\begin{array}{ccc}8\\-1\\-5\\9\end{array}\right] = \left[\begin{array}{ccc}-32\\4\\20\\-36\end{array}\right]

5 0
4 years ago
Read 2 more answers
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