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
Elina [12.6K]
3 years ago
13

If U= π(r+h), find r when U =16/1/2 and h = 2/3/4π = 3/1/7​

Mathematics
1 answer:
krek1111 [17]3 years ago
4 0

Answer:

r = 2.5

Step-by-step explanation:

U= π(r+h)

Where,

U = 16 1/2

h = 2 3/4

π = 3 1/7​

U= π(r+h)

16 1/2 = 3 1/7(r + 2 3/4)

33/2 = 22/7(r + 11/4)

33/2 = 22/7r + (22/7 * 11/4)

33/2 = 22/7r + 242/28

33/2 - 242/28 = 22/7r

(462-242) / 28 = 22/7r

220/28 = 22/7r

r = 220/28 ÷ 22/7

= 220/28 × 7/22

= (220 * 7) / (28 * 22)

= 1540/616

= 2.5

r = 2.5

You might be interested in
Please Help<br> Find the circumferences of of both circles to the nearest hundredth.
torisob [31]

Step-by-step explanation:

small circle

C= pi D

C = 3.1415(9)

C= 28.3 ft

large circle

C= 2(3.1415)(7)

C = 44 ft

Add 28.3 + 44 = 72.3 ft

7 0
3 years ago
A researcher conducted an Internet survey of 500 students at a particular college to estimate the average amount of money studen
bonufazy [111]

Answer:

The margin of error is  ME = 2.2962

Step-by-step explanation:

From the question we are told that

     The number of student is n = 500

     The highest amount is  A =$200

     The lowest amount is  B = $75

       The sample mean is  x = &140

The Standard deviation  of this set is mathematically evaluated as

            s =  \frac{A-B}{4}

Substituting values

            s =  \frac{200-75}{4}

            s = 31.25

The margin of error (ME) is mathematically evaluated as

            ME =  t_{n-1}__{\alpha }} *  \frac{s}{\sqrt{n} }

Where  t_{n-1}__{\alpha }} is the critical value for \alpha  = 0.05 i.e the significance level

     From the critical value table this is  t_{n-1}__{\alpha }}  =  1.649

So

       ME =  1.649  *  \frac{31.25}{\sqrt{500} }

      ME = 2.2962

6 0
4 years ago
Store
patriot [66]

Answer:

Store A: 4

Store B:  1

Store C: 3

Store D: 2

Step-by-step explanation:

I got it right

6 0
3 years ago
Read 2 more answers
Explain how to use a basic fact and a pattern to find 6 ✖ 100
PtichkaEL [24]
Ummm....did you mean like what is the answer to 6x100?
7 0
4 years ago
Read 2 more answers
Bubba Bulldog and all of his dog friends love to hide bones! Bubba hid 444 bones, Barry hid 555 bones, Larry hid 101010 bones, a
Nezavi [6.7K]

Answer:

58330.5 bones

Step-by-step explanation:

Essentially mean is taking the total and dividing that by the number of items.

Here, we need to add up all the bones and divide it by the number of dogs there are:

444 + 555 + 101010 + 131313 = 233322 bones

There are 4 dogs:

233322 / 4 = 58330.5 bones

4 0
3 years ago
Read 2 more answers
Other questions:
  • Jamie makes a table to show the relasionship between meters, cenimeters, and millimeters. use the rule "add 100" to complete the
    8·1 answer
  • Find the approximate side length of a square game board with an area of 131 in2.
    13·1 answer
  • Sarah mailed her computer to Store B for repairs. Her bill was: Initial Repair Cost = $1,350 Sales Tax of 7 percent = $94.50 Tot
    6·2 answers
  • Find the area of a triangle with the given vertices.
    8·1 answer
  • Han spent 50 minutes practicing the piano over the weekend. Tyler practiced the clarinet for 84% as much time as Han practiced t
    10·2 answers
  • 2 3/4- (-1/4)<br> Anyone have the answer ty
    9·2 answers
  • How to simplify algebraic fractions
    6·1 answer
  • Emma is travelling to the store 25 miles away from her house. On Emma's map, her house and the store are 5 inches apart. What is
    12·1 answer
  • If f(x)=-5 find the value of x​
    6·1 answer
  • Can anyone tell me the standard form of this parabola equation?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!