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Anna007 [38]
3 years ago
13

Help me with questions please​

Mathematics
2 answers:
Effectus [21]3 years ago
6 0
2290.22mm^2
Hope this helped
Harrizon [31]3 years ago
6 0

Answer:

2290.22147

Step-by-step explanation:

The area of a circle equation is pi r squared, so you square 27 and then multiply it by pi.

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Gemiola [76]

Answer:

(x,y)=(0,-1)

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Compare the temperature change for the two masses of cold water (50 grams and 100 grams) when the same amount of hot water was a
Vesnalui [34]

Answer:

Step-by-step explanation:

All other things being equal (and there are a lot of other things) the 50 gram mass will show a larger temperature

increase than the 100 gram mass.

Why?

The formula is the same from both masses of water (50 grams and 100 grams)

The amount of heat added is the same. (Instead of using hot water, we'll a hot plate on a very low temperature but above what they are now.).

We'll leave it on until we see a rise in temperature  delta(t1) = 10 degrees

mc delta(t) = m1 * c * delta(t1)

m = 100

m1 = 50 grams.

c is going to be divided out

we'll solve for the ratio of delta(t) / delta(t1)

100 * delta(t) = 50 (delta(t1)

100 * delta(t) = 50*10

delta(t) = 50*10/100

delta(t) = 5 degrees.

Though this may look rather convoluted, the result is telling us is that delta(t1) for the 50 gram mass is twice as big as as for the 100 gram mass.

The 100 gram mass only rises 5 degrees.

The 50   gram mass rises 10 degrees.

7 0
3 years ago
Write down in terms of n, an expression for the nth term
Scilla [17]

Answer:

{ \bf{(a).}} \\ { \tt{ {n}^{th}  = a + (n - 1)d }} \\ { \tt{ {n}^{th} = 6 + (n - 1)  \times - 4 }} \\  {n}^{th}  =  10 - 4n \\  \\ { \bf{(b).}} \\ { \tt{ {n}^{th}  =  - 8 + (n- 1) \times - 7 }} \\ { \tt{ {n}^{th}  =  -1 - 7n}}

3 0
2 years ago
Calculating the Volume of a Sphere Given Diameter What is the volume of a sphere with a radius of 3/2 feet? The volume is Pi ft3
Angelina_Jolie [31]

14.14 ft³

Plug in 3/2 in the formula, which is \frac{4}{3} \pi r^3

8 0
3 years ago
Find the radius of a circle in which the central angle, a, intercepts an arc of the given length
Nataly [62]

Answer:

17.2 in

Step-by-step explanation:

The formula for arc length is s = rФ.  Here we are to find r.  Solving this formula for r, we get:

r = s/Ф

So, in this problem, r = (9 in) / (π/6) = 54/π in ≈ 17.2 in

4 0
3 years ago
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