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
Tema [17]
3 years ago
11

Six children collect 45 pencils. 20% of the pencils need sharpening. How many pencils need

Mathematics
2 answers:
egoroff_w [7]3 years ago
6 0

Answer:

9

Step-by-step explanation:

45*2/10=45*1/5=9

Ipatiy [6.2K]3 years ago
4 0

Answer:

9

Step-by-step explanation:

You might be interested in
What number should be added to both sides of the equation to complete the square? X^2-10=7
Assoli18 [71]
I must assume that you meant   <span>X^2-10x =7.  If that is indeed the case, then:

</span>X^2-10x =7  =>  x^2 -10x + 25 - 25 = 7, so that (x-5)^2 = 32  (Add 25, then 
                                                                                                 subtract 25)
Then x-5 = plus or minus sqrt(16)sqrt(2) = 4sqrt(2).

Then x = 5 plus or minus 4 sqrt(2) (answers)
8 0
3 years ago
What is container B that is full after the pumping is complete ?
scoray [572]

<em>Answer</em>

68.4%

<em>Step-by-step explanation</em>

The volume of a cylinder is calculated as follows:

V=\pi r^2h

where <em>r </em>is the radius and <em>h </em>is the height of the cylinder.

In the case of cylinder A, its radius is r = 5 ft (= 10/2) and its height is h = 14 ft. Then, its volume is:

\begin{gathered} V_A=\pi\cdot5^2\cdot14 \\ V_A=350\pi\text{ ft}^3 \end{gathered}

In the case of cylinder B, its radius is r = 8 ft (= 16/2) and its height is h = 8 ft. Then, its volume is:

\begin{gathered} V_B=\pi\cdot8^2\cdot8 \\ V_B=512\pi\text{ ft}^3 \end{gathered}

After the pumping is completed all the liquid in cylinder A, which was full, is placed in cylinder B. If the volume of cylinder B represents 100%, then we need to find what percent, <em>x</em>, represents the volume of cylinder A. We can do this with the help of the next proportion:

\frac{512\pi\text{ ft}^3}{350\pi\text{ ft}^3}=\frac{100\text{ \%}}{x\text{ \%}}

Solving for x:

\begin{gathered} 512\pi\cdot x=100\cdot350\pi \\ x=\frac{100\cdot350\pi}{512\pi} \\ x\approx68.4\text{ \%} \end{gathered}

6 0
1 year ago
Explain why a polar curve is not always bounded.
Scrat [10]

Answer: There are lots of common polar curves that are bounded therefore a polar curve is not always bounded all the time. A polar curve is required to have an unbounded function (right side of r = f(Θ)) to be an unbounded polar. An example of an unbounded curve would be r = Θ for 0 ≤ Θ.

8 0
2 years ago
A spherical weather balloon is being inflated. The radius of the balloon is increasing at the rate of 9 cm/s. Express the surfac
Zolol [24]
Since a sphere's surface area is 4πr², we then need to find r as a function of time t, which is 9t (since it increases by 9 every second)+0 (the initial value)=9t. Plugging it in, we get 4π(9t)²=4π*36t²=144πt²
8 0
2 years ago
Product of (6x+8us^2)(x-us^2)
Lerok [7]

Answer:

−8s4u2+2s2ux+6x2

Step-by-step explanation:

=(6x+8us2)(x+−s2u)

=(6x)(x)+(6x)(−s2u)+(8us2)(x)+(8us2)(−s2u)

=6x2−6s2ux+8s2ux−8s4u2

=−8s4u2+2s2ux+6x2

7 0
3 years ago
Read 2 more answers
Other questions:
  • PLEASE ANSWER WILL GIVE BRANIEST AND A KISS :3
    15·1 answer
  • The area of a circle is 37 square meters. find the radius to the nearest hundredth
    7·1 answer
  • An urn contains 3 red and 7 black balls. players a and b withdraw balls from the urn consecutively until a red ball is selected.
    10·1 answer
  • Derek and his friends shared two small pizzas.Derek ate 7/6 of the pizzas.Which mixed number shows how much pizza Derek ate?
    8·2 answers
  • The graph shown is a direct variation. What is the rate of change?<br><br><br><br> 5<br> 10<br> 50
    12·2 answers
  • You are buying shoes online. The selling price is $29.99. The sales tax is 6.5% What is the total cost? Round to the nearest pen
    7·1 answer
  • Whats the solution for this
    14·2 answers
  • HELP ILL GIVE 10 PTS quick pleaseee
    13·1 answer
  • Help me math homework part 2
    10·1 answer
  • Can anyone walk me step by step through this?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!