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4 years ago

what is 678×789 ? I need help on this problem and I don't feel working it out but if you know that would be great!

Mathematics

2 answers:

Levart [38]4 years ago

5 0

Answer:

534,942

Step-by-step explanation:

Step 1: Multiply

678 * 789

(600 * 700) + (600 * 80) + (600 * 9) + (70 * 700) + (70 * 80) + (70 * 9) + (8 * 700) + (8 * 80) + (8 * 9)

420000 + 48000 + 5400 + 49000 + 5600 + 630 + 5600 + 640 + 72

534,942

Answer: 534,942

Salsk061 [2.6K]4 years ago

3 0

Answer:

534942

Step-by-step explanation:

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Write a definite integral that represents the area of the region. (Do not evaluate the integral.) y1 = x2 + 2x + 3 y2 = 2x + 12F

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Answer:

$A = \int\limits^3__-3}{9}-{x^{2}} \, dx = 36$

Step-by-step explanation:

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To find the area under the curve for the first equation:

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To find the area under the curve for the second equation:

$A_{2} = \int\limits^3__-3}{2x + 12} \, dx$

To find the total area:

$A = A_{2} -A_{1} = \int\limits^3__-3}{2x + 12} \, dx -\int\limits^3__-3}{x^{2} + 2x + 3} \, dx$

Simplifying the equation:

$A = \int\limits^3__-3}{2x + 12}-({x^{2} + 2x + 3}) \, dx = \int\limits^3__-3}{9}-{x^{2}} \, dx$

Note: The reason the area is equal to the area two minus area one is that the line, area 2, is above the region of interest (see image).

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

what is 678×789 ? I need help on this problem and I don't feel working it out but if you know that would be great!​

what is 678×789 ? I need help on this problem and I don't feel working it out but if you know that would be great!