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2 years ago

Norma practices violin for 50 minutes every day. how many minutes does Norma practice violin in 7 days ?

Mathematics

1 answer:

JulsSmile [24]2 years ago

3 0

350 minutes in 7 days

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2 years ago

If an object is launched at an angle of 28° with an initial velocity of 133 ft./s from a height of 6 feet how many seconds will

Tema [17]

Answer:

Hence after 3.98 sec i.e 4 sec Object will hit the ground .

Step-by-step explanation:

Given:

Height= 6 feet

Angle =28 degrees.

V=133 ft/sec

To Find:

Time in seconds after which it will hit the ground?

Solution:

This problem is related to projectile motion for object

First calculate the Range for object and it is given by ,

$R=v^2Sin$ (2Ф)/ $g$

Here R= range g= acceleration due to gravity =9.8 m/sec^2

1m =3.2 feet

So 9.8 m, equals to 9.8 *3.2=31.36 ft

So g=31.36 ft/sec^2. and 2Ф=2(28)=56

$R=133^2*Sin(56)/31.36$

$R=14664.84/31.36$

$R=467.62$ fts

Now using Formula for time and range as

$R=VxT$

Vx is horizontal velocity

$Vx=V*cos$ Ф

$Vx=133*cos$ (28)

$Vx=117.43$ ft/sec

So above equation becomes as ,

$467.62=117.43*T$

$T=467.62/117.43$

$T=3.98 sec$

T is approximately equals to 4 sec.

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3 years ago

The product of four different positive integers is 100. What is the sum of these four integers?

Leno4ka [110]

Step-by-step explanation:

The Answer for the above question is

The four integers are 1,2,5,10. And Sum of the four integers is 18 .

Method :

Product of four different positive integers is 100 .

First of all lets break the number "100"

⇒ 100 = 50*2

⇒ 100 = 25 * 2 * 2

⇒ 100 = 5 * 5 * 2 * 2

But here we get the same integers 2 and 5 and we want different positive integers . So hereby merge 5 * 2 which is 10.

Let's get to the possible combination -

After merging 5*2 = 10 we get the answer as -

⇒ 100 = 1 * 2 * 5 * 10

Here, we have 1, 2, 5, 10. these are the positive integers whose product gives 100 .

Sum of these products is -

⇒ Sum = 1 + 2 + 5 + 10

⇒ Sum = 18 .

Sum of these four Integers is 18.

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3 years ago