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
olga2289 [7]
2 years ago
12

Sand for use on icy roads is stored in a conical pile 14.2 m high and with a base diameter of 34.4 m calculate the volume of the

pile if one sander can take 6.9 m of sand, how many sanders can be filled from the pile
Mathematics
1 answer:
sammy [17]2 years ago
4 0

Answer:

1. The volume of the pile is 4,399.7719 m^3

2. The number of sanders to be filled from a pile is 638

Step-by-step explanation:

Here, we firstly would calculate the volume of the pile

Mathematically, that will be;

V = 1/3 * pi * r^2 * h

from the question, h = 14.2

Mathematically, r = d/2

r = 34.4/2 = 17.2 m

So the volume will be:

V = 1/3 * 3.142 * 17.2^2 * 14.2

V = 4,399.7719 m^3

To find the number of sanders to be filled,

we simply divide the volume obtained by the volume a sander can take

That will be;

4,399.7719/6.9

= 637.6 which is 638

You might be interested in
This table shows values that represent a function
pickupchik [31]

Answer:

the y adds 9 for every one x

Step-by-step explanation:

8 0
3 years ago
you buy a baseball and a bat and spend $31. the bat costs $19 more than the baseball. what is the price of the baseball? What is
Morgarella [4.7K]
The bat costs $25.50 and the baseball costs $5.50
4 0
3 years ago
Read 2 more answers
a quadrilateral has angles measuring 105 degrees, 80 degrees, and 45 degrees what is the measure of the 4th angle
Bond [772]

Answer: 130 degrees

Step-by-step explanation:

105+80+45+x=360

230+x=360

-230 both sides

X=130 degrees

6 0
3 years ago
A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. The number of subjects needed to estima
Ludmilka [50]

Answer:

n=(\frac{1.64(14.7)}{3})^2 =64.57 \approx 65

So the answer for this case would be n=65 rounded up to the nearest integer

And the sample size would decrease by 160-65=95 subjects

Step-by-step explanation:

1) Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

\bar X represent the sample mean for the sample  

\mu population mean (variable of interest)

s represent the sample standard deviation

n represent the sample size  

ME represent the margin of error

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

2) Solution to the problem

Since the new Confidence is 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.05, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.05,0,1)".And we see that z_{\alpha/2}=1.64

Assuming that the deviation is known we can express the margin of error is given by this formula:

ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}    (a)

And on this case we have that ME =\pm 3 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

Replacing into formula (b) we got:

n=(\frac{1.64(14.7)}{3})^2 =64.57 \approx 65

So the answer for this case would be n=65 rounded up to the nearest integer

And the sample size would decrease by 160-65=95 subjects

8 0
3 years ago
How can the order of operations be used to simplify expressions? Create your own unique example showing order of operations.
Lostsunrise [7]
10(13+12)=x thats a good one
4 0
3 years ago
Other questions:
  • One afternoon, kassim's sandwich shop sells 15 sandwiches in 45 minutes. if the shop continues to sell sandwiches at the same ra
    8·1 answer
  • Consider the sequence of steps to solve the equation:
    15·2 answers
  • A nurse has a gross income of $1200. And net income of $950 per week. What is the percentage deductions per week
    8·1 answer
  • Write the following verbal expression as an Algebraic
    10·1 answer
  • Please help ⚠️⚠️⚠️⚠️⚠️
    6·1 answer
  • Janice Corrudo is paid a commission of 15% of her yearly sales up to $85,000 and 18% of any sales above $85,000. Her total sales
    6·1 answer
  • Which mathematical concepts did Euler’s legacy include? Check all that apply
    5·1 answer
  • Please hurry I have 2 more weeks of school I need to pass
    14·2 answers
  • I need to find the answer for "n" -(n - 8) = -2
    15·1 answer
  • Is the dotted line on the shape given below a line of symmetry ?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!