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user100 [1]
3 years ago
6

Please help and EXPLAIN !!!!!!! thank you!!! =)))

Mathematics
2 answers:
Amanda [17]3 years ago
6 0
Your answer is C. $45 a day
nataly862011 [7]3 years ago
5 0

The change in profit from 3 days to 8 days = 74 - 59 = $15

The number of days is 8-3 = 5 days

The change per day is 15 / 5 = $3 per day.

The answer is A. $3

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3 \dfrac{1}{4} - ( -  \dfrac{1}{2} ) =  3 \dfrac{1}{4} +  \dfrac{1}{2}  =  3 \dfrac{1}{4} +  \dfrac{2}{4}  =   3 \dfrac{3}{4}
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klio [65]

25 × 4 = 100 - the number of all candies

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The third model is shaded to show the total number of caramel candies in 4 bags.

6 0
3 years ago
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

8 0
3 years ago
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