1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shepuryov [24]
2 years ago
12

Help like rn. Like rn please I will mark brainiest but pls help.

Mathematics
2 answers:
mixer [17]2 years ago
6 0

Answer:

Nvm

Step-by-step explanation:

U don’t need help anymore?

Naya [18.7K]2 years ago
3 0

Answer:

90

and

20

i think so ye

Step-by-step explanation:

You might be interested in
A survey was conducted to find out how much time people have to spend commuting to work. The sample means for two samples are 71
Lorico [155]

Answer:

E: None of the above

Step-by-step explanation:

Hello!

The objective is to find out how much time it takes people to commute to work.

Two samples where taken and two hypothesis tests where made:

One:

Sample mean 71 min; p-value: 0.03

Two:

Sample mean 72 min; p-value: 0.06

You have to choose from the options, a possible pair of hypotheses used for these two tests.

The parameter of the study is the population mean μ.

In the statistic hypotheses, the parameters are given either a known population value or a suspected value. So all options including sample values are wrong.

As said before the objective of the survey is to "determine how much time people spend commuting to work" in other words, whether or not the population mean is equal to a certain value.

H₀: μ = μ₀

H₁: μ = μ₀

Where μ₀ represents the theoretical value of the population mean. As you can say the hypotheses pair is two-tailed, not one-tailed.

Then the correct answer is E: None of the above

I hope this helps!

7 0
3 years ago
You bicycle along a straight flat road with a safety light attached to one foot. Your bike moves at a speed of 15 km/hr and your
Viefleur [7K]

Answer:

a)

x(t) = ( 4.167 t + 0.2 cos (2πt))

y(t) = ( 0.3 - 0.2 sin  (2πt))

b) the  foot have to be 3.32 rev/sec faster

Step-by-step explanation:

Given that:

the speed of the bike = 15 km/hr = 15 × 1000/3600 (m/sec) = 4.167 m/sec

radius of the circle when the foot moves = 20 cm = 0.2 m

radius of the circle above the ground = 30 cm = 0.3 m

Let assume that:

x(t)  should represent the vector along the horizontal moment

y(t) should be the vector along the vertical moment

The initial component will be ( 0, 0.3)

We know that the radius of the circle is given as 0.2 m, So the vector of the circle can be written as (0.2 cos t , 0.2 sin t )

Also, the foot makes one revolution in a second, definitely the frequency of the revolution = 1 and the vector for the circle is ( 0.2 cos (2πt), -0.2 sin  (2πt)), due to the fact that the foot moves clockwise.

Thus, adding all the component together ; we have:

(x(t), y(t)) = (0,0.3)+(4.167 t , 0)+(0.2 cos (2πt), -0.2 sin  (2πt))

(x(t), y(t)) = (4.167 t + 0.2 cos (2πt), 0.3 - 0.2 sin  (2πt))

Hence; the parametric equations are:

x(t) = ( 4.167 t + 0.2 cos (2πt))

y(t) = ( 0.3 - 0.2 sin  (2πt))

b)

The linear speed of rotation is :

15km/hr = 15 × 100, 000/3600 (cm/sec)

             = 416.7 cm/sec

The rotational frequency is :

= 416.7/2πr

= 416.7/2(3.14 × 20)

= 3.32 rev/sec

Hence, the  foot have to be 3.32 rev/sec faster in rotating if an observer standing at the side of the road sees the light moving backward.

4 0
3 years ago
Read 2 more answers
Help me help help help
Rasek [7]

Answer:

D.

Step-by-step explanation:

I hope this helps

hhhhhhh

7 0
3 years ago
A table with four legs will sometimes wobble if one leg is shorter than the other three, but a table with three legs will not wo
Pani-rosa [81]
The exact name of the postulate isn't coming to mind, but it's the postulate that any three points that are not on the same line will form a unique plane. A plane in mathematics is a flat surface that extends in all directions. 
4 0
3 years ago
Lisa Leslie went to Good Year and purchase two tires for her Range Rover. The total purchase price was $399.37. What was the pri
iragen [17]

Answer: 199.69

Step-by-step explanation:

399.37 divided by 2 bc that’s how many tires she bought

6 0
2 years ago
Read 2 more answers
Other questions:
  • Determine how many solutions each equation has. If one solution, state the value of x. +6+8=2−+14
    9·1 answer
  • In determining the quality of the hats in a used-hat bin, a grandmother selects the first four hats she can reach. Which samplin
    7·1 answer
  • Which expression is equivalent to 4(3−6x)+x ?
    15·2 answers
  • What is the equation of the horizontal line through (-4,6)(−4,6)left parenthesis, minus, 4, comma, 6, right parenthesis?
    9·2 answers
  • The product of 34 and the number of pounds
    14·2 answers
  • Ms. Ramirez is throwing a fundraising event to
    9·1 answer
  • Convert 24% into a growth and decay factor
    5·1 answer
  • My teacher can grade 25 homework assignments in 20 minutes. Is she working at a faster rate or slower rate than Ms. Jones, who i
    6·1 answer
  • The ratio : y is 3:1
    13·1 answer
  • Which one??? Please
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!