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
Evgen [1.6K]
3 years ago
11

Is my answer correct? If not, please tell me the correct answer and explain. Thanks in advance!

Mathematics
1 answer:
Marat540 [252]3 years ago
7 0
Unfortunately, you are incorrect because the answer is D. It makes no sense for him to make profit out of selling nothing, so A,B, and C are wrong, and D is correct because it's the only answer that says he can profit if he sells 100 DVDs.
You might be interested in
Write a quadratic function in vertex form whose graph has the vertex
ELEN [110]

Answer:

y = \frac{1}{2}(x - 5)² - 2

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (5, - 2), thus

y = a(x - 5)² - 2

To find a substitute (7, 0) into the equation

0 = a(7 - 5)² - 2

0 = 4a - 2 ( add 2 to both sides )

2 = 4a ( divide both sides by 4 )

a = \frac{2}{4} = \frac{1}{2}

y = \frac{1}{2} (x - 5)² - 2 ← in vertex form

4 0
3 years ago
Water is leaking out of an inverted conical tank at a rate of 6800.0 cubic centimeters per min at the same time that water is be
m_a_m_a [10]

Answer:

6.82 mt^3/min

Step-by-step explanation:

By congruence of triangles, the radius r of the cone base when its height is 1 meter satisfies the relation

r/1 = 2.5/6

(See picture attached)

So, r = 0.4166 meters when the water is 1 meter high.

The volume of a cone with radius of the base = R is given by

V=\frac{\pi R^2h}{3}

So, the volume of water when it is 1 meter high is

V=\frac{\pi* 0.(4166)^2}{3}=0.1817\;mt^3

One minute later, the height of the water is 1 meter + 30 centimeters = 1.30 mt

The radius now satisfies

r/1.3 = 2.5/6

and now the radius of the base is

r = 0.5416 mt

and the new volume of water is 0.3071\;mt^3

So, the water is raising at a speed of

0.3071-0.1871 = 0.12 mt^3/min

This speed equals the difference between the water being pumped and the water leaking,

So,  

<em>0.12 = Speed of water being pumped -6.8  </em>

and

Speed of water being pumped = 6.8+0.12 = 6.82 mt^3/min

8 0
3 years ago
What is the slope of the line that contains these points?x 15,17,19,21 y -10,2,14,26
9966 [12]

Answer:

  6

Step-by-step explanation:

The slope (m) can be found using the formula ...

  m = (y2 -y1)/(x2 -x1)

Any pair of points will do. We can use the first two.

  m = (2 -(-10))/(17 -15) = 12/2

  m = 6

The slope of the line is 6.

8 0
3 years ago
Last week Shelley earned $60.00 in tips uaitressing. This week she earned $72.00.
ddd [48]
12 percent more than last time
5 0
3 years ago
Claire is going to invest in an account paying an interest rate of 5.4% compounded daily. How much would Claire need to invest,
Delicious77 [7]

Answer:

P ≈ 100

Step-by-step explanation:

260 = P(1+0.054/365)^365(14)

260 = P(1.000147945)^5110

260= P(2.129621112)

P= 122.087444818

P ≈ 100

4 0
3 years ago
Other questions:
  • If y = x+ 5 were changed to y = x + 9, how would the graph of the new
    6·2 answers
  • Write the word form and tell the value of the underlined digit. 9,000,009 the first 9 is underlined
    6·1 answer
  • $5000 is invested at 3% interest. How much money must be invested at 5% interest so that the total interest from the two investm
    7·1 answer
  • Find the point of intersection of the two lines y=3x+2 and y=2x-1
    14·2 answers
  • Evaluate 7+(-4×^2)for ×=0
    15·1 answer
  • During the past school year, there were 640 students and 52 teachers. What is the ratio of students to each teacher rounded to t
    11·1 answer
  • Eliminate the parameter. <br> x = t2 + 3, y = t2 - 2
    14·1 answer
  • What could represent the total cost
    7·1 answer
  • Please help me out in optional maths​
    11·1 answer
  • Franco owns his landscaping business. He has to plant 425 plants in 47 places. After planting, how many plants will he have left
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!