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Fittoniya [83]
3 years ago
8

Pls help me! i’m very confused on this certain question.

Mathematics
1 answer:
Vitek1552 [10]3 years ago
7 0

Answer:

A

Step-by-step explanation:

scientific notation always contains a decimal number

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190 m<br> 90 m<br> 10 m<br> 40 m<br> What is the area
liberstina [14]

Answer:

Rect Area= Lw

3D Rect Area= 2(wh+lw+lh)

Step-by-step explanation:

7 0
3 years ago
A sample of 20 joint specimens of a particular type gave a sample mean proportional limit stress of 8.41 mpa and a sample standa
nignag [31]

For this problem, the confidence interval is the one we are looking for. Since the confidence level is not given, we assume that it is 95%.

 

The formula for the confidence interval is: mean ± t (α/2)(n-1) * s √1 + 1/n


Where:

<span>
</span>

α= 5%


α/2 = 2.5%


t 0.025, 19 = 2.093 (check t table)


n = 20


df = n – 1 = 20 – 1 = 19

So plugging in our values:


8.41 ± 2.093 * 0.77 √ 1 + 1/20


= 8.41 ± 2.093 * 0.77 (1.0247)


= 8.41 ± 2.093 * 0.789019


= 8.41 ± 1.65141676


<span>= 6.7586 < x < 10.0614</span>

3 0
2 years ago
Rai compares two cable plans from different companies. Which equation gives the correct value of m, the number of months for whi
tekilochka [14]

Answer:

D. 75m = 50(12)+125(m-12)

Step-by-step explanation:

m = months.

Equation for which Plans A and B cost the same.

In Plan A:

No initial fees.

$75 per month

1 month = $ 75

then;

for m month =$75 m

Total cost for plan A =  75m

In Plan B:

$50 per month for first 12 month.

1 month = $50

12 months = 50(12)

Similarly,

$125 per month for each additional month after that.

additional month= (m-12)

Plan B additional month

= 125(m-12)

Total cost for plan B = 50(12)+ 125(m-12)

Since, Plans A and B cost the same.

75m = 50(12)+125(m-12)

3 0
2 years ago
12 workers build a wall in 10hours. How long do 5 workers build a wall​
snow_lady [41]

Answer:

24 hours

Step-by-step explanation:

If 12 workers take 10 hours to build a wall, assuming they build at the same rate, it would take one worker 120 hours to build a wall.

By this logic, it would take 120/5 or 24 hours for 5 workers to build a wall

5 0
2 years ago
Read 2 more answers
Simplify: -3 1/2-(-12 1/4) mi
nasty-shy [4]

Answer: 35/4 miles..... (Hopefully I read correctly)

Step-by-step explanation:

(-7/2)-(-49/4)

(-7/2)+49/4

-14/4+49/4

35/4

Hope this helps!

6 0
3 years ago
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