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wlad13 [49]
3 years ago
12

According to the article, "How Can Your Smartphone Make Water Safe to Drink," less than 1% of phone's battery disinfects how muc

h water? *
Mathematics
1 answer:
Paha777 [63]3 years ago
7 0

Answer:

700 A

Step-by-step explanation:

if see ujbvcddfgyggcs456ujhvcddrtuijjjnbbbgc

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A page should have perimeter of 42 inches. The printing area within the page
Tamiku [17]

Overall  dimensions of the page in order to maximize the printing area is  page should be 11 inches wide and 10 inches long .

<u>Step-by-step explanation:</u>

We have , A page should have perimeter of 42 inches. The printing area within the page  would be determined by top and bottom margins of 1 inch from each side, and the  left and right margins of 1.5 inches from each side. let's assume  width of the page be x inches  and its length be y inches So,

Perimeter = 42 inches

⇒ 2(x+y) = 42\\x+y = 21\\y = 21-x

width of printed area = x-3  & length of printed area = y-2:

area = length(width)

area = (x-3)(y-2)\\area = (x-3)(21-x-2)\\area = (x-3)(19-x)\\area = -x^{2} + 22x -57

Let's find \frac{d(area)}{dx}:

\frac{d(area)}{dx} = \frac{d(-x^{2}+22x-57)}{dx} = -2x +22 , for area to be maximum \frac{d(area)}{dx}= 0

⇒ -2x+22 = 0\\2x =22\\x=11 inches

And ,

y = 21-x\\y = 21-11\\y = 10 inches

∴ Overall  dimensions of the page in order to maximize the printing area is  page should be 11 inches wide and 10 inches long .

7 0
3 years ago
you scored 72% on the Unit 1 exam and then 90% on the unit 2 exam. what was your percentage acorr increase
iVinArrow [24]
The difference between 90% and 72% is 18%
6 0
3 years ago
Stefan measured a weight of a package as 15.375 pounds. The actual weight of the package is 15.125 pounds.
Ainat [17]
15.375/15.125 x 100 =~98.4

The ~% is 98.4%
Error = ~2.6%

Part B

Be a near amount. Can be
5 0
3 years ago
Find the sum of (x + 5) and (2x + 3)
Genrish500 [490]
What you can do is subtract 1x from each side 
Then you subtract 3 from each side
Then it tells you x=2
Always put what you think x is back into the problem and see if it works out

Example on how you do it:
(x+5)=(2x+3)
5=(x+3)
2=x
7 0
3 years ago
What is the volume of a hemisphere with a radius of 3.6m ,rounded to the nearest tenth of a cubic centimeter
Mrrafil [7]

Answer:

V\approx 97.7\ m^3

Step-by-step explanation:

-A hemisphere is equivalent to half of a sphere.

- The area of a sphere is given by the formula:

V=\frac{4}{3}\pi r^3

-Given that r=3.6m, the hemisphere's volume can be calculated as:

V=\frac{4}{3}\pi r^3\\\\V_h=0.5\times \frac{4}{3}\pi r^3\\\\=0.5\times \frac{4}{3}\pi \times 3.6^3\\\\=97.7161\approx 97.7\ m^3

Hence, the hemisphere's volume is approximately  97.7\ m^3

6 0
3 years ago
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