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3 years ago

Un capital de 4000 lei este plasat în regim de dobândă simplă pe o perioadă de 3 ani cu rata dobânzii

Mathematics

1 answer:

9966 [12]3 years ago

3 0

Answer:

960

Step-by-step explanation:

The simple interest formula is the following:

I = P*r*t

Where I is the interest generated after t years, P is the inicial value and r is the rate of interest.

In this case, we have that the inicial value is P = 4000, the rate of interest is r = 8% = 0.08 and the amount of time invested is t = 3 years.

So, the interest will be:

I = 4000*0.08*3 = 960

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Calculate the mean given the frequency table

DaniilM [7]

Answer:

~15.55 is the mean.

Step-by-step explanation:

The class of frequency is given as 0-9, 10-19 and 20-29.

First of all, let us taken middle value of class:

$\dfrac{0+9}{2} = 4.5$

$\dfrac{10+9}{2} = 14.5$

$\dfrac{20+9}{2} = 24.5$

Formula for mean:

$\text{Mean = } \dfrac{\sum (m \times f)}{\sum f}$

where f is the frequency

and m is the mean value calculated in above step (4.5, 14.5 and 24.5)

The frequencies are given as:

4.5 - 24

14.5 - 20

24.5 - 32

Putting the values in above formula:

$Mean = \dfrac{4.5\times 24+14.5\times 20 +24.5\times 32}{24+20+32}\\\Rightarrow \dfrac{108+290+784}{76}\\\Rightarrow \dfrac{1182}{76} \\\Rightarrow 15.55$

Please refer to the attached image that contains the table for calculation of mean.

So, mean = ~15.55

8 0

3 years ago

A garden that is 5 ft by 6 ft has a walkway 2 ft wide

Gre4nikov [31]

Answer:

i believe it is 60 ft wide

Step-by-step explanation:

multiply 5x6 then use that same answer to multiply 2 and you'll have your answer

6 0

3 years ago

What is the length of the portion BC of the cloth?

alisha [4.7K]

Answer:

2nd option

Step-by-step explanation:

Using the sine ratio in the right triangle

sin32° = $\frac{opposite}{hypotenuse}$ = $\frac{BC}{AC }$ = $\frac{BC}{6}$ ( multiply both sides by 6 )

6sin32° = BC

3 0

2 years ago

Alice wants to buy some paper towels. She has two options. She can either buy a package of four rolls or she can buy one roll no

mart [117]

The 4 pack is better because it can save a trip back to the store

6 0

3 years ago

If tan A = 4/5; what does CSC A =?<br> Round to nearest tenth.

ZanzabumX [31]

Answer:

1.6

Step-by-step explanation:

$\tan \: A = \frac{4}{5} \\ \\ \cot \: A = \frac{1}{ \tan \: A } = \frac{1}{ \frac{4}{5} } = \frac{5}{4} \\ \\ csc\: A = \sqrt{1 + {cot}^{2}\: A} \\ = \sqrt{1 + { \bigg( \frac{5}{4} \bigg)}^{2} } \\ = \sqrt{1 + \frac{25}{16} } \\ = \sqrt{\frac{16 + 25}{16} } \\ = \sqrt{\frac{41}{16}} \\ = \frac{ \sqrt{41} }{4} \\ = \frac{6.40312424}{4} \\ = 1.60078106 \\ \therefore \: csc \: A =1.6$

6 0

3 years ago