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3 years ago

Please help me with this question.

Mathematics

1 answer:

Phoenix [80]3 years ago

3 0

Answer:

Step-by-step explanation:

F(-2)= 4(-2)-1= -9

G(-2)= (-2)^2-3= 1

f(-2)-(g-2)= -9-1= -10

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Is 4.55 and 1.23456 a rational number

kaheart [24]

Problem

Is 4.55 and 1.23456 a rational number

Solution

4.55 can be written as:

455/100 so then it could be a rational number

For the second number we have: 1.23456

And we can write this number as:

123456/100000

So then is also ratioanl

7 0

1 year ago

A lab technician made a 14 cm diameter hole through the middle of a cylinder that has a diameter of 20 cm and a height of 28 cm.

Step2247 [10]

Answer:

The volume of the finished cylinder is $4486.2 m^3$

Step-by-step explanation:

To find the volume of the finished cylinder, we have to first find the volume of the hole (with 14 cm diameter and a height of 28 cm) and subtract it from the volume of the original cylinder (with diameter of 20 cm and a height of 28 cm).

Note: The hole is also cylindrical in shape.

The volume of a cylinder is given as:

$V = \pi r^2h$

where r = radius, h = height

VOLUME OF THE HOLE

The diameter of the hole is 14 cm, hence, its radius is 7 cm (14 / 2 = 7)

Its volume is:

$V = \pi *7^2 * 28\\V = 4310.3 m^3$

VOLUME OF THE ORIGINAL CYLINDER

The diameter of the cylinder is 20 cm, hence, its radius is 10 cm (20 / 2 = 10)

Its volume is:

$V = \pi *10^2 * 28\\V = 8796.5 m^3$

Hence, the volume of the finished cylinder will be:

$8796.5 - 4310.3 = 4486.2 m^3$

The volume of the finished cylinder is $4486.2 m^3$

8 0

3 years ago

1. The following set of numbers is going to be graphed on a histogram.

statuscvo [17]

Answer:

i have the same question pls help us

Step-by-step explanation:

4 0

2 years ago

Factored completely, the expression 3x^2 - 3x - 18 is equivalent to

Dima020 [189]

Answer:

3(x−3)(x+2)

Step-by-step explanation:

4 0

3 years ago

886,424 how do i round that to the nearest 10 thousands

Contact [7]

You take the numbers that are above 5 and put them up one to the next tenth then you do that the same for thousands. your anwser would be 900,000

6 0

4 years ago

Read 2 more answers