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vichka [17]
2 years ago
11

Why is this not working -2^2

Mathematics
2 answers:
BARSIC [14]2 years ago
5 0

Answer:

-4

Step-by-step explanation:

(-2)^2=4 because a negative number squared is always positive

-(2)^2=-4

Alex17521 [72]2 years ago
4 0

Answer:

try putting the minus value in brackets

Step-by-step explanation:

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A cross section is the intersection of a _____ an a _____
IgorLugansk [536]
A cross section is the intersection of a solid an a plane
5 0
3 years ago
An open metal tank of square base has a volume of 123 m^3
snow_lady [41]

Answer:

  a) h = 123/x^2

  b) S = x^2 +492/x

  c) x ≈ 6.27

  d) S'' = 6; area is a minimum (Y)

  e) Amin ≈ 117.78 m²

Step-by-step explanation:

a) The volume is given by ...

  V = Bh

where B is the area of the base, x^2, and h is the height. Filling in the given volume, and solving for the height, we get:

  123 = x^2·h

  h = 123/x^2

__

b) The surface area is the sum of the area of the base (x^2) and the lateral area, which is the product of the height and the perimeter of the base.

S=x^2+Ph=x^2+(4x)\dfrac{123}{x^2}\\\\S=x^2+\dfrac{492}{x}

__

c) The derivative of the area with respect to x is ...

S'=2x-\dfrac{492}{x^2}

When this is zero, area is at an extreme.

0=2x -\dfrac{492}{x^2}\\\\0=x^3-246\\\\x=\sqrt[3]{246}\approx 6.26583

__

d) The second derivative is ...

S''=2+\dfrac{2\cdot 492}{x^3}=2+\dfrac{2\cdot 492}{246}=6

This is positive, so the value of x found represents a minimum of the area function.

__

e) The minimum area is ...

S=x^2+\dfrac{2\cdot 246}{x}=(246^{\frac{1}{3}})^2+2\dfrac{246}{246^{\frac{1}{3}}}=3\cdot 246^{\frac{2}{3}}\approx 117.78

The minimum area of metal used is about 117.78 m².

3 0
2 years ago
What is 99999999+-4?
iVinArrow [24]
99,999,999 + (-4) is basically 99,999,999 - 4

99,999,999 - 4 = 99,999,995
8 0
3 years ago
Read 2 more answers
After a party you have 1/3 apple pie left and 5/6 pumpkin pie left. How much more pumpkin pie than apple pie is left?
motikmotik

There is 1/2 more pumpkin pie than apple pie left.

1/3 x 2 = 2/6

5/6 - 2/6 = 3/6

3/6 / 3 = 1/2

6 0
3 years ago
2. Jason can put his money in a savings account and earn about 12 cents in interest this month, or he can
julsineya [31]

Answer:

12 cents

Step-by-step explanation:

opportunity cost of the next best option forgone when one alternative is chosen over other alternatives

by loaning matt the money he forgoes the opportunity to earn 12 cents in interest. this is his opportunity cost

8 0
2 years ago
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