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serious [3.7K]
4 years ago
12

I need help with math

Mathematics
1 answer:
seraphim [82]4 years ago
5 0
It's "A"
Explanation:The formula is
V=1/3r^2<span>πh
V=1/3*5^2*</span><span>π*12
V=1/3*25*</span><span>π*12
V=1/3*300</span><span>π
V=100</span><span>π</span>
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(a) Find the slope of the curve y= x^2 - 2x - 3 at the point ​P(2​,​ -3) by finding the limit of the secant slopes through point
gayaneshka [121]

Answer:

Step-by-step explanation:

P=(2,-3)

Q=(a,a²-2a-3)

\Delta y=a^2-2a-3-(-3)=a^2-2a\\\Delta x=a-2\\\\\displaystyle \lim_{a \to 2} \dfrac{a^2-2a-3-(-3)}{a-2}  \\\\=\lim_{a \to 2} \dfrac{a^2-2a}{a-2}  \\\\=\lim_{a \to 2} \dfrac{a(a-2)}{a-2}  \\\\=\lim_{a \to 2} \dfrac{a}{1}  \\\\=\lim_{a \to 2} a  \\\\=2\\

Proof:

y'=(x²-2x-3)'=2x-2

y'(2)=2*2-2=2

7 0
3 years ago
5/8 of the cats perferred drinking with there tongue but 3/16 wanted a straw if there was 39 cats that gave one of these 2 answe
AveGali [126]

Answer:

208cats

Step-by-step explanation:

⅝=tongue

³/16=straw=39cats

⅝+³/16=13/16

meaning total number of cats is 16/16

If ³/16=39cats

16/16=?

39×16/3

=208cats

6 0
3 years ago
A number of miles driven this month was 30% decrease of the number of miles driven last month ?
Murljashka [212]

Answer:

70 miles were driven this month

Step-by-step explanation:

suppose 100 miles were driven last month

30%= 30/100*100=30 miles

30% decreasewould be 100-30= 70 miles

7 0
4 years ago
Read 2 more answers
Please check my answer!!! PLEASE
Arturiano [62]
It is negative association, not positive since the line is going down.
5 0
3 years ago
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Someone please explain this to me, thank you.<br><br> -63 / (-9) =
tangare [24]
Since they're both negative the answer is 7
7 0
4 years ago
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