MATHEMATICS HIGH SCHOOL

Which of the following is a rational number?
Ο Α) π
B) 1.425
Oc) 50
OD) -4

Answers

Answer 1
Answer: B) 50 is rational number
Answer 2
Answer: OC:50 is the correct answer
Rational numbers are numbers that aren’t already expressed as a quotient or fraction.

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I just purchased a swimming pool with the dimensions of 15 feet across and 42 inches deep. Yes it is a circle. I need to know how many gallons of water it will hold. I am having a tanker brought out and need to know how much they need to bring because they charge by the gallon to bring it out.

Answers

When the pool is full to the rim, you'll have a cylinder of water.  The diameter
of the cylinder is 15-ft, and the height of the cylinder is 42 inches.

Here are the tools you'll need:

-- Volume of a cylinder = (pi) (radius squared) (height)
-- Radius = 1/2 diameter = 7.5 feet
-- Keep everything in the same units.  Depending on which unit
you prefer,  7.5 feet = 90 inches,  and 42 inches = 3.5 feet.

I like inches and cubic inches, because I remember that
1 gallon = exactly 231 cubic inches.

Volume of the cylinder = (pi) (radius squared) (height)

Volume = (pi) (90 squared) (42) = (pi) (8,100) (42) = 1,068,769.8 cubic inches

1,068,769.8 / 231 = 4,626.7 gallons
===================================
Slightly easier:

about 7.48 gallons = 1 cubic foot

Volume = (pi) (7.5-ft squared) (3.5-ft) = 618.5 cubic feet

(618.6 cubic-ft) x (7.48 gallons per cubic-ft) = 4,627.1 gallons

The results are not identical, but don't panic.  They are equal
to within about 51 ounces (0.009 percent).  The tanker will either
spill or evaporate more than that during the process of the delivery.

By the way ... you'd be wise not to install the pool on the second floor.
That much water weighs a little over 19.3 tons !




 

What is the length of a segment with end points at (-3,4) and (4,4)? a. 1 b. 4 c. 7 d. 8

Answers

The length of a segment with end points (-3,4) and (4,4) is c. 7

Plz halp i need to get this right.

Answers

Answer:

C

Step-by-step explanation:

Ya) Match the graph shown with one of the following equations.
y = x + 2
y=-x-2
y = x-2
y = -x + 2
y = -X
A
B
C
D
E
O
х
b) Which one of the following points lies on the line 3y = 2x - 1?
(2,6) (1,2) (2, 1) (-2, 1) (2,-6)
A
B
C
D
E

Answers

Answer:

See attachment.

a)  y = -x + 2

b)  (2,1)

Step-by-step explanation:

Explained in the attachment.

$4 is what percent of $50

Answers

it is 8 percent of 50. 

This is 1 way-
4/50=%/100 You now have a proportion. Cross multiply.
50%=400 Replace % with any variable.
50x=400 Now divide both sides of the equation by 50.
x=8

(% is basically the percentage of 4 of 50 over 100. its much easier to solve percentage problems when the percentages are over 100. 100 represents a full percentage. 
example- 4 of 100 is 4% of 100)

2nd example-
Since the percentage can be found if over 100 as well (%/100), and since 100 is a multiple of 50, we can do 4 of 50 (which would look like 4/50) and multiply  both numbers by 2 to get the percentage. These are our steps:

4/50× 2/2=
8/100

Therefore, 4 of 50 is 8% of 50

Suppose we want to choose 2 objects without replacement from the 4 colors red, blue, green, purple. How many ways can this be done, if the order of the choices matter?

Answers

Answer:

Number of ways = 6

Step-by-step explanation:

Given:

Total number of choices = 4

Taken object choices = 2

Find:

Number of ways

Computation:

Number of ways =  [4 × 3] / 2!

Number of ways = [4 × 3] / [2 × 1]

Number of ways = [12] / [2]

Number of ways = 6

Answer:

These are the awnsers to it!

1: 12

2. 6
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