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lorasvet [3.4K]
2 years ago
14

I need help with this question, thank you. EXPLAIN.

Mathematics
2 answers:
ratelena [41]2 years ago
8 0

Answer:

263.76

Step-by-step explanation:

It is 7 times 12 times 3.14. Then you round your answer

Genrish500 [490]2 years ago
3 0
The formula for the volume of a cylinder is V=πr^2h. Which is volume equals pie * radius squared * height. pie = 3.14. radius is diameter/2, 3.5 in this case, then squared which is 3.5 * 3.5. And the height is 12. You take 3.14, 3.5^2, and 12 then multiply each term. So your substituted equation would be V=3.14(3.5^2)12.

This is how it would go:

V=3.14(3.5^2)12.
3.5^2 = 12.25.
- just squared 3.5, that equals 12.25

V=3.14(12.25)12
3.14 * 12.25 = 38.465
- pie times 12.25 equals 38.465

V=38.465(12)
38.465 * 12 = 461.58
- 38.465 * 12 = 461.58

V=461.58
- Your answer is 461.58 centimeters!!

if you didn’t know,
^ is what you use for exponents
* is what you use for multiplying
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matrenka [14]
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Inequalities have phrases like "at most" or "at least" or "no more than" in them. Solutions are a range of values, ranging between 2 values, or from a particular value to positive or negative infinity.
5 0
3 years ago
Read 2 more answers
PLZ HELP I BEEN SUCK FOE SO LONG PLZ RIGHT ANSWER I WILL CRY
mel-nik [20]

Answer:

40 students

Step-by-step explanation:

In this problem, one is given the ratio ( 8 : 3 ), since a ratio is another way of writing a fraction one can rewrite it as; \frac{8}{3} (8) represent the number of students who want to learn about magnets, and (3) represents the number of students who want to learn about magic tricks.

In the problem, it is also given that 25 more students wanted to learn about magnets compared to magic tricks. If one uses the parameter (x) to represent the factor by which the fraction \frac{8}{3} is reduced, then one can get the equation;

8x = 3x + 25

Use inverse operations to solve,

8x = 3x + 25

-3x

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x = 5

Substitute back in to find out how many students want to learn about magnets,

8x

= 8(5)

= 40

3 0
2 years ago
Rotating a polygon in Quadrant II 270° clockwise is the same as what?
lora16 [44]
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When you rotate up an object 360</span>°, it will revert into its original places. That mean, if you rotate it more than 180°, then rotating it to the opposite direction will be easier/closer than you do. In this case, you rotate the polygon 270° so it will equal to 360° - 270°= 90° of opposite direction, which means counterclockwise. The quadrant shouldn't have any meaning in this question.
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2 years ago
Now see if you can solve these word problems about time and distance.
ladessa [460]

Answer:

3.5 hours

Step-by-step explanation:

Ediburgh -------------------------------350 miles-------------------------London

Let the distance traveled by train from Edin to London be "x"

hence the distance traveled by train from London to Edin would be "350-x"

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  • The rate of London to Edin train is 40

Let the time they meet be"t"

Now, we know distance formula to be D = RT

Where

D is distance

R is rate

and

T is time

<u>Train from Edin to London:</u>

x = 60t

<u>Train from London to Edin:</u>

350-x = 40t

Solving for x:

350 - 40t = x

We put this into first equation:

x = 60t

350 - 40t = 60t

350 = 100t

t = 350/100

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They meet after 3.5 hours

4 0
3 years ago
What is the answer to -3x = 4.2 ?
hammer [34]

Answer:

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