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2 years ago

Plz help ASAP!! Explain your answer! I will mark at brainliest!!!

Mathematics

1 answer:

Vera_Pavlovna [14]2 years ago

3 0

The room is not in shape of a square but a rectangle.

Question says Length is: 19 inches

Diagonal is: 20.6 inches

In a square all sides are equal

Rectangle has just two sides equal

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Imran has a list of his top 10 favorite movies. When he sees a new movie and adds it to his list, he moves Speed Racer down thre

Radda [10]

Chech that question again

4 0

2 years ago

Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follow

guajiro [1.7K]

Answer:

a) x = 1.52

b) s = 1.16

Step-by-step explanation:

We have that:

5 students watched 0 movies.

9 students watched 1 movie.

5 students watched 2 movies.

5 students watched 3 movies.

1 student watched 4 movies.

(a) Find the sample mean x.

Sum divided by the number of students. So

$x = \frac{5*0 + 9*1 + 5*2 + 5*3 + 1*4}{5 + 9 + 5 + 5 + 1} = \frac{38}{25} = 1.52$

(b) Find the approximate sample standard deviation, s.

Standard deviation of the sample.

Square root of the sum of the squares of the values subtracted from the mean, divided by the sample size subtracted by 1. So

$s = \sqrt{\frac{5*(0-1.52)^2 + 9*(1-1.52)^2 + 5*(2-1.52)^2 + 5*(3-1.52)^2 + 1*(4-1.52)^2}{24}} = \sqrt{\frac{32.24}{24}} = 1.16$

3 0

2 years ago

HELP!!!! I need an answer soon, please!!! I will give Brainliest!!!!

sattari [20]

Answer:

180

Step-by-step explanation:

In this drawing I made, I added some variables. a and d are complimentary, meanwhile b and c are complimentary. A straight line is an angle of 180 degrees. Therefore, a + b = 180.

7 0

3 years ago

A cherry falls from a tree branch that is 9 feet above the ground.

miss Akunina [59]

The cinematic equation is:
h (t) = (1/2) * a * t ^ 2 + vo * t + h0
Where,
a: acceleration
vo: initial speed
h0: initial height
Substituting values:
h (t) = (1/2) * (- 32) * t ^ 2 + (0) * t + 9
h (t) = - 16t ^ 2 + 9
For t = 0.2 we have:
h (0.2) = - 16 * (0.2) ^ 2 + 9
h (0.2) = 8.36 feet
To touch the ground we have:
-16t ^ 2 + 9 = 0
16t ^ 2 = 9
t = root (9/16)
t = 0.75 s
Answer:
The height of the cherry after 0.2 seconds is:
h (0.2) = 8.36 feet
the cherry hits the ground at:
t = 0.75 s

5 0

2 years ago

Plsssssss help got 20 mins the question is: The sin of angle DCB is

Elena L [17]

Answer:

i. <DCB = $53.13^{o}$