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3 years ago

Looking at the histogram, how many students took the exam? A: 37B: 14C: 5D: 28

Mathematics

2 answers:

miss Akunina [59]3 years ago

7 0

Answer:

Step-by-step explanation:

I hope I helped have a great day.

zavuch27 [327]3 years ago

3 0

Answer:

(-2, 33) and (5, - 16)?

A. 7x- y=51

B. 7x+ y= -47

C. 7x+ y= -14 D. 7x+y= 19

Step-by-step explanation:

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A GROUP OF STATISTICS STUDENTS DECIDED TO CONDUCT A SURVEY AT THEIR UNIVERSITY TO FIND THE AVERAGE (MEAN) AMOUNT OF TIME STUDENT

Kay [80]

Answer: Option 'c' is correct.

Step-by-step explanation:

Since we have given that

n = 240

mean = 22.3 hours

standard deviation = 6 hours

At 99% level of confidence, z = 2.58

So, interval would be

$\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=22.3\pm 2.58\times \dfrac{6}{\sqrt{240}}\\\\=22.3\pm 0.99\\\\=(22.3-0.99,22.3+0.99)\\\\=(21.31,23.29)$

Hence, Option 'c' is correct.

3 0

3 years ago

A cylindrical container contains some sand. If the diameter of the container is 10 inches and its height is 3 inches, about how

Mazyrski [523]

Answer:

251.33in²

Step-by-step explanation:

A cylindrical container contains some sand. If the diameter of the container is 10 inches and its height is 3 inches, about how much sand fits inside the container?

We solve the above question using the formula for Total surface area of a cylinder.

TSA = 2πr (h + r) Square units.

Where

h = Height of the cylinder

r = Radius of the cylinder

Diameter of the container is 10 inches

Hence, radius = Diameter/2 = 10/2 = 5 inches

Height is 3 inches.

Hence, Total surface area =

2 × π × 5 (5 + 3)

= 10π × (8)

= 251.32741229 in²

Approximately = 251.33 in²

Therefore, the amount of sand that can fit into the cylinder = 251.33 in²

6 0

3 years ago

Which would be the best method to use to solve the following equation. Explain your reasoning.

s2008m [1.1K]

Answer:

x = 3 and x = -2

Step-by-step explanation:

The given equation is :

$x^2-x-6=0$

We need to solve the given equation.

We can solve it using Completing the Square method.

We take two numbers such that their product is -6 and sum is -1.

So,

$x^2-x-6=0\\\\x^2+2x-3x-6=0\\\\x(x+2)-3(x+2)=0\\\\(x-3)(x+2)=0\\\\x=3\ and\ x=-2$

so, the values of x are 3 and -2.

4 0

3 years ago

Write the opposite of 47

Mademuasel [1]

Answer:

-47

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Sin^2x+2Sin^2x/2-2sinx.sin^2x/2+cotx=0

Schach [20]

{0.221115
{x=2.677945 is the awnser for this one

4 0

3 years ago

Looking at the histogram, how many students took the exam? A: 37B: 14C: 5D: 28​

Looking at the histogram, how many students took the exam? A: 37B: 14C: 5D: 28