All categories

3 years ago

Crea una lista de 10 figuras musicales:

Mathematics

1 answer:

MrRa [10]3 years ago

4 0

Realmente no entiendo esta pregunta, lo siento mucho, pero espero que lo resuelvas. Lo siento, nuevamente..

You might be interested in

An employer wishes to compare typing speeds of graduates from 2 different study programs: A and B. Eight random graduates from c

Karolina [17]

Answer:

Calculated value t = 0.614< 1.782

we accepted null hypothesis for 12 degrees of freedom at 0.05 level of significance .

Step-by-step explanation:

we will t-test t = x⁻- y⁻ /S√ n₁+n₂-2

Given An employer wishes to compare typing speeds of graduates from 2 different study programs: A and B

course A type at 62, 85, 59, 64, 73, 70, 75, and 72

mean of x is x⁻ = ∑x / n

mean of x = 62+85+59+64+73+70+75+ 72 /8 = 70

x⁻ = 70

course B type at 75, 64, 81, 55, 69, and 58

mean of y is y⁻ = ∑y / n = 75+64+81+55+69+ 58/6 = 67

y⁻ =67

course A course B

x y x- x⁻ (x-x⁻ )^2 y- y⁻ (y-y⁻ )^2

62 75 8 64 8 64

85 64 15 225 -3 9

59 81 -11 121 14 196

64 55 -6 36 -12 144

73 69 3 9 2 4

70 58 0 0 -9 81

75 5 25

72 2 4

∑( (x-x⁻ )^2= 484 ∑( (y-y⁻ )^2= 498

Adding ∑( (x-x⁻ )^2+ ∑( (y-y⁻ )^2= 982

n₁+n₂-2 = 8+6-2=12

now S^2 = 982/ 12 =81.833

Null hypothesis :H₀:μ₁=μ₂ ( there is no difference between A and B)

Alternative hypothesis :H₁:μ₁≠μ₂

level of significance ∝=0.05

we will use t-test t = 0.614 ( see attachment )

The degrees of freedom = n₁+n₂-2 = 8+6-2=12

From tabulated value t = 1.782

Calculated value t = 0.614< 1.782

we accepted null hypothesis for 12 degrees of freedom at 0.05 level of significance .

There is no difference between Course A and Course B

Download docx

8 0

3 years ago

The height of a volleyball, h, in feet, is given by h = −16t^2 + 11t + 5.5, where t is the number of seconds after it has been h

faust18 [17]

Answer:

The volleyball travel high enough to clear the top of the net.

Step-by-step explanation:

The height of a volleyball, h, in feet, is given by h = −16t² + 11t + 5.5, where t is the number of seconds after it has been hit by a player.

Now, for h = 7.3 feet, we can write

7.3 = - 16t² + 11t + 5.5

⇒ 16t² - 11y + 1.8 = 0

Using the quadratic formula we get,

$t = \frac{- (- 11) \pm \sqrt{(-11)^{2} - 4(16)(1.8)}}{2(16)}$

⇒ $t = \frac{11 \pm 2.4}{32}$

⇒ t = 0.27 or t = 0.42

Therefore, for the two real positive values of t the volleyball travel high enough to clear the top of the net. (Answer)

5 0

3 years ago

Kerry skates laps around the playground.

Zarrin [17]

So to start this off, we need to find the area of the playground. We can simply multiply 150*2 and 50*2, and we get 300 and 100. Add those together and we get 400m.
Now, we can identify the number of laps it takes. But first, we have to convert kilometers into meters. there are 1000 meters in 1 km, so we will use 1000 to find the answer
Now, we can do 1000/400 to find the answer, which is 2.5
Therefore, it will take Kerry 2.5 laps to skate around the entire park

Answer: 2.5 laps

Hope this helped!!! :D

3 0

4 years ago

1. a.) Find the Surface Area and Volume of the right prism. Surface Area: 9 am Volume: LE 6 cm 17 cm

lutik1710 [3]

Answer:

Step-by-step explanation:

9 times 6 times 17 = volume

918 - volume

surface area= 2( length times width plus length times height plus height times width )

So just substitute the values and you get 618 cm squared

have a wonderful Day!

3 0

3 years ago

A certain granola bar has 2 grams of fiber. This is 8% of the recommended daily value. How many grams of fiber are recommended d

xeze [42]

If you formulate the question into a word equation it comes out:

2 grams fiber = .08 × DRV
↑ ↑ ↑ ↑ ↑
2 g fiber is 8% of the daily recommended value.

Now solve for DRV to find the daily recommended value:

2 g fiber/.08 = DRV

DRV = 25 g fiber

6 0

3 years ago