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just olya [345]
3 years ago
5

What is 9 time 9? Please help.

Mathematics
2 answers:
Mandarinka [93]3 years ago
7 0
9 times 9 gives you 81

bazaltina [42]3 years ago
5 0
The answer is 81 because multiplication is just adding numbers. Just add 9+9 nine times.
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pishuonlain [190]

Answer:

60ft

Step-by-step explanation:

Let's x, y be the width and length of the surrounding rectangle. Since the area is 450 sq feet, this means xy = 450 or y = 450/x

The perimeter of this rectangle is (since there are 3 sides only)

f(x,y) = 2x + y

This is something we need to minimize. We can start by substituting y = 450/x

f(x) = 2x + 450/x

Let's take the first derivative of this function and set it to 0

f'(x) = 2 - \frac{450}{x^2} = 0

2 = \frac{450}{x^2}

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3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Two sides of a right triangle measure 6 cm and 8 cm what is the length of the hypotenuse
andrew-mc [135]

Answer:

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5 0
3 years ago
In a research laboratory, a scientist measures the mass of a 1-carat diamond and finds it to be 200 milligrams, measured to the
vlada-n [284]

Answer:

D=3.5\ gr/cm^3

Step-by-step explanation:

<u>Density</u>

The density of an object of mass m and volume V is given by

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It can be expressed in common units like gr/lt, Kg/m^3, gr/cm^3 or any other combination of proper mass [M] by volume [V] units.

The data provided in the question is

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\displaystyle D=\frac{0.2\ gr}{0.057 \ cm^3}

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We have expressed the result with 1 decimal place because the mass was measured to the nearest hundred milligrams (or one-tenth grams). Any further decimal is senseless because that precision comes from calculations, not from measurements.

6 0
3 years ago
Please solve quickly
Lilit [14]
6/9 .. z. Z. Z. Z. Z. Z.
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