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astra-53 [7]
3 years ago
9

What is the opposite of the opposite of -1.4

Mathematics
2 answers:
worty [1.4K]3 years ago
3 0
Its still going to be -1.4
Sergio [31]3 years ago
3 0

Pretty sure it's 1.4 the opposite of  7 is -7. I might be thinking of absolute value so don't take my answer as solid. I hope it helps

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If 1200 cm^2 of material is available to make a box with a square base and an open top find the largest possible volume of the b
strojnjashka [21]
Surface area of box=1200 cm² 
<span>Volume of box=s²h </span>
<span>s = side of square base </span>
<span>h = height of box </span>
<span>S.A. = s² + 4sh </span>
<span>S.A. = surface area or 1200 cm², s²
 = the square base, and 4sh = the four 'walls' of the box. </span>
<span>1200 = s² + 4sh </span>
<span>1200 - s² = 4sh </span>
<span>(1200 - s²)/(4s) = h </span>


<span>v(s) = s²((1200 - s²)/(4s)) </span>
<span>v(s) = s(1200 - s²)/4 . </span>
<span>v(s) = 300s - (1/4)s^3</span>

by derivating
<span>v'(s) = 300 - (3/4)s² </span>
<span>0 = 300 - (3/4)s² </span>
<span>-300 = (-3/4)s² </span>
<span>400 = s² </span>
<span>s = -20 and 20. </span>
again derivating
<span>v"(s) = -(3/2)s </span>
<span>v"(-20) = -(3/2)(-20) </span>
<span>v"(-20) = 30 </span>
<span>v"(20) = -(3/2)(20) </span>
<span>v"(20) = -30 </span>


<span>v(s) = 300s - (1/4)s^3 </span>
<span>v(s) = 300(20) - (1/4)(20)^3 </span>
<span>v(s) = 6000 - (1/4)(8000) </span>
<span>v = 6000 - 2000 
v=4000</span>
4 0
3 years ago
using the graphing method to solve the equation 13(0.25)^x=7 Round your answer to the nearest thousandth
netineya [11]

Answer:

x = 0.447

Step-by-step explanation:

You need to use your graphing calculator for this.

In y=, put 13(0.25)^x in Y1 and put 7 in y2. Using 2nd trace, find the intersections.

The answer I got was x = 0.447.

3 0
3 years ago
PLEASE HELP !! ILL GIVE BRAINLIEST !!
MrMuchimi

Answer:

pqs and onl

Step-by-step explanation:

pqs onl

3 0
2 years ago
Read 2 more answers
Derivative of cos(4x)
son4ous [18]
D/dx ( cos (4x)) = - sin (4x) · d/dx ( 4x) = - 4 sin (4x) 
7 0
3 years ago
Two equivalent ratios for 14/8
FromTheMoon [43]
14 to 8
14/8 is going to equal 7/4 you get by doing this :<span> </span>
<span>= (14 ÷ 2)/(8 ÷ 2) </span>
<span>= 7/4 </span>
<span>= 1 3/4</span>
7 0
3 years ago
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