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3 years ago

I need help with my math

Mathematics

2 answers:

stepladder [879]3 years ago

8 0

Answer:

28.26

Step-by-step explanation:

π r² = A

A = (3.14) (3²)

A = 3.14 · 9 = 28.26

klemol [59]3 years ago

3 0

Hello There!

WHAT WE KNOW

Pi = 3.14

R = 3

HOW TO SOLVE

A = 3.14*9

Answer <em>28.26</em>

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Using a 16-sided number cube, what is the probability that you will roll a multiple of 4 or an odd prime number? The number 1 is

iogann1982 [59]

<h3>Answer: 0.563 (choice C)</h3>

================================================

Explanation:

E = event space

E = set of outcomes we want to happen

E = rolling a multiple of 4 or rolling an odd prime number

E = {4,8,12,16 3,5,7,11,13}

n(E) = number of items in set E

n(E) = 9, (four multiples of 16+five ways to roll odd prime number)

-----

S = sample space

S = set of all possible outcomes (whether we want them to happen or not)

S = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}

n(S) = number of items in set S

n(S) = 16

-----

P(E) = probability of event space occurring

P(E) = probability of rolling a multiple of 4 or rolling an odd prime number

P(E) = n(E)/n(S)

P(E) = 9/16

P(E) = 0.5625

P(E) = 0.563

3 0

3 years ago

Which number should be added to the expression x^2-8x to change it into a perfect square trinomial?

vovangra [49]

The perfect square $(x-a)^2$ can be expanded as follows:

$(x-a)^2=x^2-2ax+a^2$

So, we have to think of the term $-8x$ as $-2ax$ , which implies $a=4$ .

Thus, we have to add $a^2$ , i.e. 16, to complete the perfect square:

$(x-4)^2 = x^2-8x+16$

3 0

3 years ago

A rectangular prism has a length of 16 feet, a height of 15 feet, and a width of 8 feet. What is its volume, in cubic feet?

irinina [24]

The answer is 1920 cubic feet.

8 0

3 years ago

Read 2 more answers

The figure shown is made up of a square and a triangle. Express the area of the figure in terms of y.

Doss [256]

Answer:

$y^2+2y$

Step-by-step explanation:

The area of a square can be found by $s^2$ and the area of a triangle can be found by $\frac{1}{2}b*h$ .

The area of the square with side length y is $y^2$ .

The area of the triangle with the base 4 and height y is $\frac{1}{2}4*y = 2y$

Adding the areas together gives $y^2+2y$

8 0

4 years ago

What is the volume, in cubic inches, of the right rectangular prism shown below?

sergejj [24]

Answer:

450 cubic inches

Step-by-step explanation:

the formula to get volume is l×w×h. 12.5×4.5×8=450

7 0

3 years ago