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4 years ago

Can some one help me.

Mathematics

2 answers:

Amanda [17]4 years ago

4 0

Answer:

Step-by-step explanation:

2²×2

4×2

8 is the answer

saveliy_v [14]4 years ago

3 0

Answer:

k2j

j=2,k=2

(2)2×(2)

4×2

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(a) What resonant frequency would you expect from blowing across the top of an empty soda bottle that is 24 cm deep, if you assu

Kryger [21]

Answer:

a) 357.29 Hz

b) 535.9375 Hz

Step-by-step explanation:

v = Velocity of sound in air = 343 m/s

l = length = 24 cm

$l=\frac{1}{4}\lambda \\\Rightarrow \lambda=4l$

$f=\frac{v}{\lambda}\\\Rightarrow f=\frac{v}{4l}\\\Rightarrow f=\frac{343}{4\times 0.24}\\\Rightarrow f=357.29\ Hz$

∴ Resonant frequency is 357.29 Hz

b) Here one third is filled with soda

So, length becomes $l=24-\frac{24}{3}=16\ cm$

$f=\frac{v}{4l}\\\Rightarrow f=\frac{343}{4\times 0.16}\\\Rightarrow f=535.9375\ Hz$

∴ Resonant frequency is 535.9375 Hz

6 0

4 years ago

A company is developing a new high-performance wax for cross country ski racing. In order to justify the price marketing wants,

andrew11 [14]

Answer:

A)Yes they should market the wax, because it melts before 55 seconds

C) Null hypothesis: mean <55 vs. Alternative hypothesis :mean =55

D) the value is 51.33 seconds

Step-by-step explanation:

The selected samples for the champion are : 57.9, 62.9, 50.6, 50.5,48.2,47.2,50.2 and 43.1

The mean is ;

Sum =57.9 + 62.9 + 50.6 + 50.5+48.2+47.2+50.2+ 43.1 =410.6

Mean= 410.6/8 =51.33= mean

Assuming Significant =0.05 thus applying this level will give you 51.28-51.38

if specifically, the mean time to finish their standard test course should be less than 55 seconds for a former Olympic champion, then the null hypothesis is correct

Then;

Null hypothesis: mean <55

Alternative hypothesis :mean =55

7 0

3 years ago

What are the partial products that resault from multiplying 15×32

Eva8 [605]

Answer:

Partial products are 300, 150, 20 and 10. The value of 15×32 is 480.

Step-by-step explanation:

We need to find the partial products of 15×32.

First write each number as the sum of their place values.

$15=10+5$

$32=30+2$

Now, write 10 and 5 in first row, and 30 and 2 in first column as shown below:

10 5

30 30×10=300 30×5=150

2 2×10=20 2×5=10

Therefore partial products are 300, 150, 20 and 10.

Add these partial product to get the value of product.

$15\times 32 = 300+150+ 20+10$

$15\times 32 = 480$

The value of 15×32 is 480.

5 0

4 years ago

Complete the equation and tell which property you use 16+31=31_

Lorico [155]

Property to use for 16+31 is addition. 16+31=31+16. just reverse yhe numbers

6 0

3 years ago

15-6n=6 what does n equal

user100 [1]

Hello :
<span>15-6n=6
15-15-6n = 6 -15
-6n = -9
n = (-9)/(-6)
n = 3/2</span>

6 0

3 years ago

Read 2 more answers

Can some one help me.​

Can some one help me.