Answer:
Let x represent the edge dimension of the square base in feet. Then the area of the base or lid is x², and the height of the box is 5/x². Total cost is then ...
... cost = cost of lid + 4×(cost of one side) + cost of bottom
... cost = 0.2x² + 4×(0.2x(5/x²)) + 0.5x²
... cost = 0.7x² + 4/x
We can differentiate this with respect to x and set that derivative to zero. This will give us the x-value at which the cost is a minimum.
... d(cost)/dx = 1.4x -4/x² = 0
... x³ = 4/1.4
... x = ∛(20/7) ≈ 1.419
Then the height of the box is
... height = 5/x² ≈ 5/2.01351 ≈ 2.483
The box is 1.491 ft square and 2.483 ft high.
______
The average cost of the top and bottom is (0.2 +0.5)/2 = 0.35 per square foot. The overall cost will be minimized when the average cost of each face is the same. That is, the areas of the lateral faces will be equal and must be 0.35/0.2 = 1.75 times the area of the top or bottom to make the average cost of a lateral face equal to that of the top or bottom. Hence, the base will be square, and the box will be 1.75 times as high as it is wide or deep. The base edge dimension is then ∛(5/1.75) ≈ 1.419 ft.
Step-by-step explanation:
Pls pls pls help me! I will give brainliest and points!
Find the area of each trapezoid or kite.
can yall plz help me whit this question
Marie is bringing bagels and cream cheese to school as a birthday snack for her class. The cost of b bagels and c packages of cream cheese is 0.85b+2.5c dollars. Marie is bringing 30 bagels and 2 packages of cream cheese.
What price did Marie pay for the bagels and cream cheese?
Answer:
I don’t know this I just need points
Step-by-step explanation:
Answer:
$30.50
Step-by-step explanation:
(0.85*30)+(2.5*2)=30.5
The volume of a pyramid is 47 3. The height of the pyramid is 6 meters. What is the area of
its base?
473x6= 2,838
the answer should be 2,838?
Answer:
1,419
Step-by-step explanation:
because 473 times 6
Please help! Look at the picture.
Answer:a c d!!
Step-by-step explanation: tbh I searched it up
PLEASE HELP ME.. (no links)
Answer:
I think it is c
Step-by-step explanation:
i need help and if u get the answer plz explain it
Answer:
G) 10 Hours
Step-by-step explanation:
150/3= 50 miles per hour
500 miles divided by 50 is 10 hours
when 2 pipes fill a pool together, they can finish in 5 hrs. if one of the pipes fills half the pool then the other takes over the finishes filling the pool, it will take them 18 hrs. how long will it take each pipe to fill the pool if it were working alone?
Answer:
about 10 hrs each id say
Step-by-step explanation:
I just did 5 times two
The time taken to fill the pool if it were working alone is 18 hours.
What is multiplication?One of the four fundamental mathematical operations, along with addition, subtraction, and division, is multiplication. Multiply in mathematics refers to the continual addition of sets of identical sizes.
The symbols cross (×), asterisk (*), and dot (·) are used to denote multiplication. You most frequently utilize the cross when writing in your notebooks. In computer languages and algebra, the asterisk and dot are both utilized (higher mathematics).
Given:
When 2 pipes fill a pool together, they can finish in 5 hrs,
One of the pipes fills half the pool then the other takes over to finish filling the pool, it will take them 18 hrs
1 / 2 of pool = 9 hrs as given
full pool = 9 × 2 = 18 hours
Therefore, The time taken to fill the pool if it were working alone is 18 hours.
To know more about multiplication:
https://brainly.com/question/1135170
#SPJ6
A food shop makes wraps where you can only choose one kind of wrap, one meat, and one veggie. (NO TROLL ANSWER)
The question is in the picture below^^
Giving brainliest so no links
____________________________________________________________________
༶•┈┈⛧┈♛ ♛┈⛧┈┈•༶༶•┈┈⛧┈♛ ♛┈⛧┈┈•༶v༶•┈┈⛧┈♛ ♛┈⛧┈┈•༶----
Answer:
a.) 2 in.
Step-by-step explanation:
Answer:
A is your answer
Step-by-step explanation:
if you look you can see were the line stops. your welcome
Without evaluating each expression, determine which value is the greatest.
Group of answer choices
(−756)÷(−934)
(−756)⋅(934)
(−756)+(−934)
756−934
Explain Reasoning
Answer:
756−934 is the greatest because the others are more in the negatives
Step-by-step explanation:
given b(17 5) c(11 -3) d(-1 2) and e(x -6) find the value of x so that bc ll de
WILL GIVE BRAINLIEST
Please help...
Will someone please help on the questions circled in black...
Answer: 55.041
Step-by-step explanation:
A restaurant manager recorded the drinks ordered by 150 customers. Each customer ordered one drink. The results are shown in the circle graph below.
How many customers ordered juice, tea or water?
Answer:
82% of people ordered juice, tea, and water
Step-by-step explanation:
Answer:
123 customers
Step-by-step explanation:
12%tea+30%juice+(100-12-30-18=40) 40% water=
82%
82% of 150
150*0.82
123
Gina has $87 in her piggy bank. She spends $32.67 on a gift for her sister. How much money does Gina have left?
Answer:$49.33
Step-by-step explanation:
87.00 - 32.67
= 49.33
Remember to add the dollar sign :D
$49.33
Answer: $54.33
Step-by-step explanation:
87.00
- 32.67
_____________
54.33
△ PQR is rotated by 180° in a counterclockwise direction about the origin to obtain △ P′Q′R′. What are the coordinates of △ P′Q′R′?
Answer:
it is A
Step-by-step explanation:
NEED ANSWER ASAP WILL GIVE BRAINLIEST
In a pair of complementary angles, the measure of one angle is 1/3 the measure of the other angle. Which equation below represents m, the measure, in degrees, of the larger angle?
A. 4m=180
B. 4m=90
C. 4/3m=180
D. 4/3m=90
Answer:
d
Step-by-step explanation:
The ratio of Chocolate to Batter is C : 1, which is the unit rate.
Use the table to determine the value of C
Chocolate (cup) Batter (cup)
1/2 1
2 4
3 6
A. 2
B. 1
C. 2/3
I think it may be 2:1 (answer A)
it's the best I could think of
hope this helped!
I need help plz 8th grade math
Answer:
1.25 percent
2. 25 percent
3. 65 percent
4. no
Please help asap! (Middle school math
Answer:
multiply 12 times 4, then multiply that answer by 5.
Answer:
Step-by-step explanation:
multiply 12 times 4, then multiply that answer by 5.
Solve the system using addition. Use pencil and paper. Explain why the addition method is a good choice for solving the system. If you wanted to solve for x first, is the addition method still a good choice? Explain.
x-2.5y=12.5
-x+2.3y=11.9
Answer: the answers are x = -292.5 and y = -122
Step-by-step explanation:
Elimination is combining equations to obtain an equation with just one variable. This is only possible if the coefficients of one variable in both equations are opposed and will cancel each other out when put together. Elimination is most effective when it occurs naturally in the equations, but equations may also be modified to produce typical coefficients by multiplying or dividing equations by a given value. The next step would be to utilize the equation we devised to determine the variable's worth and then insert that value back into the original equation to determine the remaining variable.
For solving the question to find x we have to make the coefficients of y the same. for that, we will multiply the first equation by 2.3 and the second equation by 2.5.
After that, we get the 2 equations as
2.3x-5.75y = 28.75
-2.5x+5.75y = 29.75
then by adding the 2 equations we get
-0.2x = 58.5
and by dividing 58.5 by -0.2 we get
x = -292.5
substituting the value of x in any equations above we get
y = -122
Determine how many solutions the system has. (Hint: Both lines are graphed over each other)
A. Infinitely many solutions
B. I am Spartacus!
C. One solution
D. No solution
Answer:
the answer is a
Step-by-step explanation:
because they are on top of one another there is an infinity of solutions
Gabby just joined a new yoga studio. The studio charges a monthly fee plus an extra fee for each class students attend. The monthly cost for attending c classes is 20.50+2c dollars. Gabby plans to attend 9 classes this month.
What price will Gabby pay if she attends 9 classes this month?
ANSWER FOR BRAINLIEST
The circumference of a circle is 17π ft. Find its radius, in feet.
Answer:
howdy
Step-by-step explanation:
2.71 is the answer i think
What is the volume of the pyramid?
I will report if you send links
Answer:
The answer is 1133.33 i got it from go ogle so blame me if i got it wrong blame go ogle can i have Brainliest
Step-by-step explanation:
Answer:
66 2/3
Step-by-step explanation:
The way to solve this is The general volume of a pyramid formula is given as: Volume of a pyramid = 1/3 x base area x height. Where Ab = area of the polygonal base and h = height of the pyramid. Note: The volume of a pyramid varies slightly depending on the polygonal base.
What i did was i first tried to do 17 x 20 x 10 which game 3400 but when i remembered that V=1/3 x base area x height which would be 1/3 x 17 x 20 = 113 1/3 but if the base was 10 it would be 1/3 x 10 x 20 = 66 2/3. so i think the base is 10 and the answer would be 66 2/3
If i am wrong i'm sorry
Need Help Please ASAP
Answer:
first step; subtract 7 from both sides. you are left with -3n=8. step two; divide both sides by 3. it should get you to -n=8. therefore n=-8
Step-by-step explanation:
i hope this helped you! :)
a diagram of a wheelchair ramp made of concrete is shown below how much concrete was used to make it?
Answer:
Step-by-step explanation:
07.01)
Which of the following sets shows all the numbers from the set {3, 4, 5, 6} that are part of the solution to the equation 5x + 4 < 29? (4 points)
a. {4, 5, 6}
b. {3, 4, 5}
c. {3, 4}
d. {3}
i gotta finish missing work, i'll give brainliest to whoever answers right
Answer:
Step-by-step explanation:
7. 6 + 1/2 + 1/2 = 7
8. shade it
9. 1.3 + 0.2 + 0.4 = 1.9 0.8 + 0.2 + 0.7 = 1.7
10. (2)(4)(5) = 40
(4)(5)(1) = 20
(5)(6)(0) = 0
hope dis helps ^-^
Which THREE side lengths CAN NOT make a triangle
11m, 11m, and 12m
5m, 7m, and 8m
6m, 10m, and 21m
Answer: 6m, 10m, and 21m
Step-by-step explanation:
The two smaller sides have to add to be greater than the third side. 6+10 is 16 which is smaller than 21.
Answer: D. 21cm
Step-by-step explanation: because you divide all sides by 2 then get youe slope form and multiply by seven
