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LiRa [457]
3 years ago
7

Which one is correct?

Mathematics
2 answers:
Maslowich3 years ago
7 0

Answer:

B = 706.5

Step-by-step explanation:

here you are given the diameter you need to First find a radius and radius is half of the diameter which is equal to 30 /2 = 15

Area of the circle is

\pi \: r { }^{2}

3.14× 15×15 = 706.5

jeka943 years ago
5 0

Answer:

The first one (A) is the answer I got!

Step-by-step explanation:

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How do i find the answer?
Radda [10]

by just addding it and diving

6 0
3 years ago
The angle of elevation of the top of a tower from a point 42 metres away from it's base on level ground is 26 degrees. find the
Hatshy [7]

Answer:

20.485 Meters

Step-by-step explanation:

So first you wanna draw a diagram.  Start with the tower, then on the ground to the left (or right) draw a point.  The point will be labeled as 42 m away from the tower.  Now draw a line from that point to the top of the tower.  This makes your triangle, and that angle you just drew that touches the point is 26 degrees.

Now, since you have a right triangle you can use trig.  You know an angle and a side.  Specifically, relative to the 26 degree angle you know the adjacent angle and want the opposite, which is the tower.  So opposite and adjacent is tangent.  So you set up tan(26) = o/42 where o is the opposite side.  

So solving you get o = 20.485 meters

3 0
3 years ago
A limited-edition soccer ball costs $30, and the sales tax is 6%. What is the total cost?
frez [133]

Answer:

$31.80

Step-by-step explanation:

The ball will cost 100% of its price plus 6% of its price for a total of 106%.

To use percentages as a factor and multiply, they must be divide by 100, making the multiplication factor version of 106% 1.06.

Multiply the cost of the ball by your multiplication factor:

30 x 1.06 = 31.8

Money is written to two decimal places, making your answer $31.80

6 0
3 years ago
Read 2 more answers
The measurement of the width of a garden plot is 44 m. Its actual width is 45.5 m.
romanna [79]
Answer:  -3.3%

By not knowing how i did it, means you will still not know how to do it next time you encounter a similar problem.

Knowing how to solve a problem is just as important or even more important than just knowing the solution.

5 0
3 years ago
For the function f(x)=5x^3-6, find f^-1
max2010maxim [7]

Answer:

f^{-1} means the inverse function

f^{-1} = \sqrt[3]{(x + 6)/5}

Step-by-step explanation:

f^{-1} means the inverse function

to find an inverse function, flip the x and y variables and solve for y

f(x) = 5x^3 - 6

y = 5x^3 - 6

x = 5y^3 - 6

x + 6 = 5y^3

(x + 6)/5 = y^3

\sqrt[3]{(x + 6)/5} = y

5 0
2 years ago
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