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3 years ago

How long does it takes the earth to complete one full revolution?A. 90B. 180C. 365

Mathematics

1 answer:

EleoNora [17]3 years ago

7 0

C.365 because one revolution takes 365.25 days or one year

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What was the average speed if I drove 60 miles per hour to get to my grandmas house and 30 miles per hour to get home. Represent

siniylev [52]

Answer:

40 mph.

Step-by-step explanation:

Suppose grandma's house is 30 miles away (any distance would do but 30 is convenient).

Speed = distance / time

time = distance / speed

Time to get there = 30/60 = 1/2 hour.

Time to get back = 30/30 = 1 hour

Average speed = total distance/ total time

= (30 + 30) / ( 1 + 1/2)

= 60 / 1.5

= 40 miles per hour.

You cannot take the average of the speeds directly

(60+ 30)/2 = 45 is not correct as you cannot average ratios ( speed is a ratio).

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3 years ago

Whats ski mask first ever song<br>

Lelu [443]

Answer:

it was catch me on soundclouud

Step-by-step explanation:

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2 years ago

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Is B the answer??? PLEASE HELP

NARA [144]

Yes, you are correct!

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3 years ago

A professor records the difference between the marks scored by the students in the class test last week and those scored in the

dezoksy [38]

Answer: $(10.82\ , 13.18)$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\mu\pm\ z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size : n= 35 , large sample (n>30)

Mean difference : $\overline{x}=12$

Standard deviation : $\sigma=3$

Significance level : $\alpha=- 1-0.999=0.001$

Critical value : $z_{\alpha/2}=z_{0.0005}=3.4807567$

Now, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students will be :-

$12\pm\ (3.4807567)\dfrac{2}{\sqrt{35}}\\\\=12\pm1.18\\\\=(10.82\ , 13.18)$

Hence, the 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students = $(10.82\ , 13.18)$

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3 years ago

Find the future value if £7400 is<br> invested for 6 years at 12.8% p.a.

Free_Kalibri [48]

Answer:

5683.2 Euro's

Step-by-step explanation:

p=7400 Euro's

r=12.8*1/100

t=6yrs

I=P*R*T

7400*12.8/100*6

=5683.2 Euro's

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3 years ago

How long does it takes the earth to complete one full revolution?A. 90B. 180C. 365​

How long does it takes the earth to complete one full revolution?A. 90B. 180C. 365