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katrin [286]
2 years ago
12

Find the circumference and the area of a circle with diameter 2 cm.

Mathematics
1 answer:
ivolga24 [154]2 years ago
3 0

Answer:

c = 6.28cm

area \:  = 3.14 {cm}^{2}

Step-by-step explanation:

circumferece \\  = 2\pi \: r \\  = 2 \times 3.14 \times 1 \\  = 6.28cm

area = \pi {r}^{2}  \\  = \pi \times 1 \times 1  \\  = 3.14 {cm}^{2}

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In a class 30 of students, 13 have a cat and 7 have a dog. There are 4 students who
AVprozaik [17]

Answer:

4/13

Step-by-step explanation:

"given that they  have a cat?" means you  are referring to only the students that have cats(that is the number on the bottom)

i am very bad at explaining math lol  

7 0
2 years ago
Marlene's taxable income is $95,000. Use this tax schedule to calculate the total amount she owes in taxes. A. 12,88.75 B. 17,90
zheka24 [161]
The answer is C. 

Since here taxable income is over $77,100 and below $160,850, her tax is $15,698.75 + [.28*($95,000 - $77,100)].

Tax = $15,698.75 + [.28*($17,900)]<span>.
       = </span>$15,698.75 + [$5012]<span>.
       =</span><span> $</span><span>20,710.75

Thank you for posting this question. Please feel free to ask me more.</span>
7 0
3 years ago
Solve each equation.<br> 1. x+6=4<br> 2.x- -4 = -6<br> 3.2(x-1)=-200<br> 4.2x+-3=-23
ziro4ka [17]

Step-by-step explanation:

1) x+6 =4

x. =4-6

x. =-2

2) x-(-4) =-6

x+ 4. =-6

x. =-6-4

x. =-10

3)2(x-1)=-200

2x-2 =-200

2x. = -200+2

2x. = -198

x. = -198/2

x. = -99

4)2x+(-3) =-23

2x-3. =-23

2x. =-23+3

2x. =-20

x. =-20/2

x. = -10

3 0
1 year ago
3. A rocket is launched vertically from the ground with an initial velocity of 64 ft / sec . ( a ) Write a quadratic function h
lys-0071 [83]

Answer:

See below.

Step-by-step explanation:

The rocket's  flight is controlled by its initial velocity and the acceleration due to gravity.

The equation of motion is h(t) = ut + 1.2 g t^2 where  u = initial velocity, g = acceleration due to gravity ( = - 32 ft s^-2) and t = the time.

(a) h(t) = 64t  - 1/2*32 t^2

h(t) = 64t - 16t^2.

(b) The graph will be a parabola which opens downwards  with a maximum at the point (2, 64) and x-intercepts at (0, 0) and (4, 0).

The y-axis is the height of the rocket and the x-axis  gives the time.

Maximum height = 64 feet, Time to maximum height = 2 seconds, and time in the air = 4 seconds.

6 0
3 years ago
Read 2 more answers
Please answer these 2 questions please!
Leno4ka [110]

Answer:

The 4th answer, at the bottom.

Step-by-step explanation:

The first answer is proportional, because y is equivalent to .5x.

The second answer is also proportional, because the ratios are equivalent.

The third answer is also proportional, because the line goes through the origin.

The fourth answer isn't proportional, because the ratios aren't equivalent.

5 0
3 years ago
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