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Montano1993 [528]
3 years ago
11

Find the area of the surface obtained by rotating the curve y x2 0 ≤ x ≤ 2 about the y axis

Mathematics
1 answer:
Rudiy273 years ago
4 0

<span>ds=<span>√<span>1+<span><span>(<span><span>dy</span><span>dx</span></span>)</span>2</span></span></span><span>dx</span>=<span>√<span>1+<span>14</span><span>(<span>x4</span>−2+<span>1<span>x4</span></span>)</span></span></span><span>dx</span></span>

<span>=<span>√<span><span>14</span><span>(<span>x4</span>+2+<span>1<span>x4</span></span>)</span></span></span><span>dx</span>=<span>√<span><span>1<span>22</span></span><span><span>(<span>x2</span>+<span>1<span>x2</span></span>)</span>2</span></span></span><span>dx</span></span>

<span>=<span>12</span><span>(<span>x2</span>+<span>1<span>x2</span></span>)</span><span>d<span>x</span></span></span>

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Please help me on this
11111nata11111 [884]

Answer: 11 boxes of cards for $72

Step-by-step explanation:

Brennan's equation would be

y=6x+6

Gabriel's Equation would be

y=5x+17

when they spend the same amount the equations will be equal

6x+6=5x+17

x+6= 11

x=11

so 11 boxes they would spend the same

To figure out cost, put 11 into the first equations

y=6(11)+6= 66+6= 72

y=5(11)+17= 55+17 = 72

so they each spent $72

5 0
3 years ago
Unit test<br> 4% of a number is what fraction of that number?
AlexFokin [52]

Answer:

1/25

Step-by-step explanation:

Well, in order to figure this out, we need to figure out how many times 4 goes into 100, because it is 4 out of 100%.

So if you divide 100 by 4 you get 25, which means 4 goes into 100 25 times.

So the fraction would be 1/25 of the number.

Hope this helps :)

5 0
3 years ago
If f(x)=2x^2+6,find the value of f(-3). Show all work
goblinko [34]
Just plug -3 where x is into the equation 2x^2 + 6 and solve
f(-3) = 2(-3)^2 + 6
f(-3) = 2(9) + 6
f(-3) = 18 + 6
f(-3) = 24
8 0
3 years ago
Does the graph of the equation y = 7 - 2x increase or decrease? A) decreases because the x values decrease from left to right B)
Nutka1998 [239]
Y=mx+b
m=slope=rise/run
if slope>0, then it increases
if slope<0, then decreases because it is going down


y=7-2x
y=-2x+7
-2<0
decreasing
because the y values decrease from left to right
the x values always increase if you go from left to right

B is the answer
7 0
3 years ago
Read 2 more answers
Suppose you are choosing between checking account A, which charges a $7.50 monthly fee, $1 per check, and $2 per ATM visit; and
Kisachek [45]

I'd go with Checking account B because its cheaper .


8 0
3 years ago
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