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
Natali [406]
3 years ago
12

Please help me find the length of EC

Mathematics
1 answer:
harina [27]3 years ago
6 0

Answer:

15

Step-by-step explanation:

BD=AC

E is the midpoint of both lines, so BE=CE

You might be interested in
I need help please someone help
schepotkina [342]

Answer:

It's the second box.

Step-by-step explanation:

There, you are getting the most product for the cheapest.

4 0
3 years ago
Using differential calculus, maximize the volume of a box made of cardboard (top is open) as shown in Figure A. 15, subject to t
lana [24]

The maximum volume of the box is 40√(10/27) cu in.

Here we see that volume is to be maximized

The surface area of the box is 40 sq in

Since the top lid is open, the surface area will be

lb + 2lh + 2bh = 40

Now, the length is equal to the breadth.

Let them be x in

Hence,

x² + 2xh + 2xh = 40

or, 4xh = 40 - x²

or, h = 10/x - x/4

Let f(x) = volume of the box

= lbh

Hence,

f(x) = x²(10/x - x/4)

= 10x - x³/4

differentiating with respect to x and equating it to 0 gives us

f'(x) = 10 - 3x²/4 = 0

or, 3x²/4 = 10

or, x² = 40/3

Hence x will be equal to 2√(10/3)

Now to check whether this value of x will give us the max volume, we will find

f"(2√(10/3))

f"(x) = -3x/2

hence,

f"(2√(10/3)) = -3√(10/3)

Since the above value is negative, volume is maximum for x = 2√(10/3)

Hence volume

= 10 X 2√(10/3)  -  [2√(10/3)]³/4

= 2√(10/3) [10 - 10/3]

= 2√(10/3) X 20/3

= 40√(10/27) cu in

To learn more about Maximization visit

brainly.com/question/14682292

#SPJ4

Complete Question

(Image Attached)

3 0
1 year ago
RESUELVE EL SIGUINTE PORBLEMA En la escuela "Soy Feliz porque soy diverso", hay 230 estudiantes en total. De estos, 35 son mujer
Tanzania [10]

Answer:

1) a. 195 are males

b. Males are the 85 %

2) 1/2

Step-by-step explanation:

Number of all the students: 230

35 are females

x are males

Then 35 + x = 230

x = 230 - 35 → 195

To determine the amount of males, from the total we apply the percent.

Percent = (Amount of males / Total of students) . 100

% = (195 / 230) . 100 = 85 %

2. In first place, Maria spent 13 for the book.

In second place, Maria spent 29 for the pencil box.

In total, she has spent 13+29 = 42

But, how many dolars have the grandpa gave to her?.

We can also apply percent and fractions, where:

(Book / Total) + (Pencil box/Total) + (What she did not spend/Total) = 1

13 + 29 + x = T

13/T + 29/T + x/T = 1, in conclussion x = 42

Total of money given = 84

Then, Maria has not spent the half of money→ 1/2

7 0
3 years ago
. can someone help pls
disa [49]

Answer:

The answer is 3,906.25

Step-by-step explanation:

All you have to do is divide 15,625 by 4! :)

6 0
2 years ago
Can someone help me learn to do ratios. I'm in 6th grade and I was absent during the lesson. I'm afraid ill fail if I don't lear
marin [14]

Answer:  24: 80

Step-by-step explanation: 6 can go into 24 4 times. So if we do the same for 20 it will be 20 times 4. Hence, answer is 24:80

7 0
3 years ago
Read 2 more answers
Other questions:
  • A set of numbers is transformed by taking the log base 10 of each number. The mean of the transformed data is 1.65. What is the
    6·1 answer
  • Pls help!! Mathematics related
    10·2 answers
  • I need help in 19.b.
    5·1 answer
  • Please Helpppppp
    9·1 answer
  • Choose the correct simplification of the expression (−2x + 4y)(3x − 7y).
    11·2 answers
  • The lovin lemon company sells a 4 gallon jug of lemonade for $24 the sweet and sour company sells an 8 pack of 1 quart bottles o
    9·1 answer
  • Write an equation in slope-intercept form: (1,6) and (2,3) are on the line
    13·1 answer
  • Enter the area of rectangle PQRS in square units in the second box enter the perimeter of rectangle of PQRS
    15·2 answers
  • 38r - 18 = 54r - 98 ............
    8·1 answer
  • Please help me again I have 2 tries again please and explain, please
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!