3 years ago

CAN U PLZ ANSWER THIS ITS FOR A TEST

Mathematics

1 answer:

iVinArrow [24]3 years ago

4 0

Answer:

A. 300in^2

Step-by-step explanation:

Area=LWH

15*10*2=300

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The arc of the parabola y = x^2 from (3,9) to (4,16) is rotated about the y-axis. Find the area of the resulting surface. Please

Hitman42 [59]

Answer:

156.5

Step-by-step explanation:

Thinking process:

The area can be calculated using the formula:

$S = \int\limits^4_3 {2\pi x\sqrt{1+}(2x)^{2} } \, dx$

We let the substitution take place.

Therefore, we let $u = 1 + 4x^{2}$

Thus, $du = 8dx.$

So,

$xdx = \frac{1}{8}du$

Also, the interval of the integration changes to [ 37, 65]

Thus,

$S = \int\limits^4_3 {2\pi \sqrt{1+4x^{2} } } \, dx \\= \int\limits^65_35 {2\pi \sqrt{\frac{1}{8}u } } \, dx$

= $\frac{1}{6} [ 65^{\frac{3}{2}-37^{\frac{3}{2} } }$

= 156.5 units²

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3 years ago

What point is a solution?

vladimir1956 [14]

(3,2) is the solution

7 0

3 years ago

Read 2 more answers

2. Which is the following equation rewritten in slope-intercept form: -8x = 2 - 2y

Anna007 [38]

Answer:

B, y = 4x + 1

Step-by-step explanation:

to get it into y- intercept form we need to write it in the form y = mx + b

-8x = 2 - 2y, move 2y to the other side and -8x to the other side they both become positive.

2y = 8x + 2, dividing each by 2

yields y = 4x + 1

Hope this helps

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3 years ago

PLEASE HELP ILL MARK BRAINLIEST AND GIVE 5 STATS AND LIKE IT PLEASE

Dahasolnce [82]

Answer:

36÷3÷2÷3=2

Step-by-step explanation:

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2 years ago

Marta conducts emissions inspections on cars. She finds that 8 percent of the cars fail the inspection. Let X be the number of c

exis [7]

Answer:

mean - 12.5

SD - 12.0

Step-by-step explanation:

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3 years ago