All categories

2 years ago

2. From 61 to 58. Is that a percent increase or decrease?

Mathematics

1 answer:

max2010maxim [7]2 years ago

4 0

Answer:

A decrease

Step-by-step explanation:

You might be interested in

Be Strong Now, Because Things Will Get Better. It Might Be Stormy Now, But It Can't Rain Forever.

Archy [21]

Answer:

aw ty but is there a question?

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Please help me. After charging for 1/3 of an hour, a phone is at 2/5 of its full power. How long will it take the phone to charg

yanalaym [24]

Answer:

Step-by-step explanation:

5 0

3 years ago

Write a equation of a line through (4, 6) and (-10, 2)

Ludmilka [50]

Answer:

y=2/7x+34/7

Step-by-step explanation:

the slope of this line is 2/7.

y=2/7x+?

? is the y-intercept.

Looking at the line that we have graphed, we can see that it intersects at 34/7 y.

the equation for the line that goes through 4,6 and -10, 2 is

y=2/7x + 34/7

4 0

2 years ago

A rectangular storage container with an open top is to have a volume of 24 cubic meters. The length of its base is twice the wid

Mariana [72]

Answer:

419.25

Step-by-step explanation:

The calculation of the cost of materials for the cheapest such container is shown below:-

We assume

Width = x

Length = 2x

Height = h

where, length = $2 \times width$

Base area = lb

= $2x^2$

Side area = 2lh + 2bh

= 2(2x)h + 2(x)h

= 4xh + 2xh

Volume = 24 which is lbh = 24

$h = \frac{24}{2x^2} \\\\ h = \frac{12}{x^2}$

Now, cost is

$= 13(2x^2) + 9(4xh + 2xh)\\\\ = 13(2x^2) + 9(4x + 2x)\times \frac{12}{x^2} \\\\ = 26x^2 + \frac{648}{x}$

now we have to minimize C(x)

So, we need to compute the C'(x)

$= 52x - \frac{648}{x^2}$

C"(x) $= 52x - \frac{1,296}{x^3}$

now for the critical points, we will solve the equation C'(x) = 0

$= 52x - \frac{648}{x^2} = 0\\\\ x = \frac{648}{52}^{\frac{1}{3}}$

$C" = ((\frac{648}{52} ^{\frac{1}{3} } = 52 + \frac{1296}{(\frac{648}{52})^\frac{1}{3} )^3}\\\\ = 52 + \frac{1296}{\frac{648}{52} } >0$

So, x is a point of minima that is

= $(\frac{648}{52} )^\frac{1}{3}$

Now, Base material cost is

$= 13(2x^2)\\\\ = 26(\frac{648}{52} )^\frac{2}{3}$

= 139.75

Side material cost is

$= \frac{648}{x} \\\\ = \frac{648}{(\frac{648}{52})^\frac{1}{3} }$

= 279.50

and finally

Total cost is

= 139.75 + 279.50

= 419.25

4 0

3 years ago

Please Hurry, I need an answer, quick my assignment is due today.

lys-0071 [83]

Answer:

8.25 hrs

Step-by-step explanation:

it takes 3/4 to replace all tires in a car

you then multiply 3/4 by 11

5 0

3 years ago