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3 years ago

Simplify: 9^-3 Please help!

Mathematics

1 answer:

dalvyx [7]3 years ago

7 0

Answer:

Fraction form: 1/729

Decimal form: 0.00137174...

Exponent form: 3^-6

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I really need help with this one. I’ll give u brainliest

zaharov [31]

Answer

248

I think :P

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2 years ago

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A right prism has height 7½ and triangular bases with sides of length 5, 12, and 13 What is the: Total Surface Area of the Prism

sdas [7]

Given:

A right prism has height 7½ and triangular bases with sides of length 5, 12, and 13.

To find:

The total surface area of the prism.

Solution:

We have,

Height of prism = 7½ = 7.5

Sides of triangular base are 5, 12, 13. These sides of Pythagorean triplets because

$5^2+12^2=13^2$

$25+144=169$

$169=169$

So, the base of the prism is a right triangle.

Area of a triangle is

$Area=\dfrac{1}{2}\times base \times height$

$A_1=\dfrac{1}{2}\times 5\times 12$

$A_1=30$

The area of the base is equal to the area of the top, i.e., $A_2=30$ sq units.

Perimeter of the base is

$P=5+12+13$

$P=30$

The curved surface area of the prism is

$CSA=\text{Perimeter of the base}\times \text{Height of the prism}$

$CSA=30\times 7.5$

$CSA=225$

Now, the total area of the prism is

$A=A_1+A_2+CSA$

$A=30+30+225$

$A=285$

Therefore, the total surface area of the triangular prism is 285 square units.

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2 years ago

ten people are in a club and three are going to be on the “planning committee”. how many different groups of three people are po

Alchen [17]

Answer:

Step-by-step explanation:

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3 years ago

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-0.9+28<br> ----<br> 6<br> help me solve the task <br>im a little lazy

Anvisha [2.4K]

Answer:

around 4.52.

Fraction form: $4\frac{52}{100}$

Step-by-step explanation:

Brainliest?

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2 years ago

Does -2(z+3)-z=-z-4(z+2) have one,zero or infinite solutions

Andrew [12]

Hello from MrBillDoesMath!

Answer:

One solution (z = -1)

Discussion:

-2(z+3)-z=-z-4(z+2) =>

-2z -6 -z = -z -4z - 8 =>

-3z -6 = -5z -8 => add 6 to both sides

-2z = -5z -2 => add 5z to both sides

3z = -5z +5z -3 =>

3z = -3 =>

z = -1

Thank you,

MrB

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3 years ago