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3 years ago

9

ONE MOR TIME SINCE THESE BOTS KEEP GIVING ME SCAM LINKS. I'm Looking for the sum of all the answers, also need to round the neat

est tenth. I got 11 but somehow it was wrong. Pls help quickly

2 answers:

kati45 [8]3 years ago

8 0

The sum of the four answers is -8.3 i believe

Pepsi [2]3 years ago

5 0

x= 7.5 x= 4.5

x=1.2 x= 6

x=-16 x=2

x=-3 x=3

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The number of daily sales of a product was found to be given by S = 600xe−x2 + 600 x days after the start of an advertising camp

Elena-2011 [213]

Answer:

a. 20520

b. 12600

Step-by-step explanation:

Given the function S = 600xe^-x² + 600.

a. To find the average, we have to find the definite integral of the function because average, as it is known, is the sum of data points divided by the size of its dataset, this can be used for discrete data. Integral formula is just the continuous form of average, so we are using integral because we were given an interval of x= 0 to X = 30.

Let's integrate 100xe^x² first. Let –x² = u, this means –2xdx = du and we have dx = –du/2x. Also, when x = 0, u = –(0)² = –0 and when x = 30, u = –(30)² = –900. When we make our substitutions we have:

–600(xe^udu)/2x = –600(e^udu)/2 upon integrating that we have –600(e^u)/2. Applying our interval we have

–600[(e^900)/2 – (e^0)/2] ≈ – [– 3.7 – (1/2)] = –600 (–4.2) = 600 x 4.2 = 2520

Now let's integrate 600, with the interval x = 0 to x = 30 (we are using this interval here because the substitution we made didn't affect this).

We have, upon integrating:

600x.

Substituting our intervals we have:

600(30 – 0) = 600 x 30 = 18000.

Adding that up we have: 2520 + 18000 = 20520.

b. The same method is needed, just difference of interval.

Therefore, after integrating the first component with intervals u = 900 to u = 2500 (from x² = u) we have:

–600[(e^2500)/2 – (e^900)/2] ≈ –600[2.7 – 3.7] = –600(–1) = 600.

Then for the second component:

600x using x = 30 to x = 50

600(50 – 30) = 600 x 20 = 12000.

Adding that up we have:

12000 + 600 = 12600.

4 0

3 years ago

Your friend claims that there is not enough information given to find the value of x.Is your friend correct?

Kay [80]

No not a full question

6 0

4 years ago

Round to the nearest tenth 3.2649

katovenus [111]

Answer:

3.3

Step-by-step explanation:

5 0

3 years ago

If you drive 9hours and 465 kilometers how long would it take you to drive 768 kilometers

romanna [79]

I think it would be 13 hours possibly

8 0

3 years ago

Find the volume of this cylinder. Please help

algol13

Answer:

$\boxed {\boxed {\sf 384 \ ft^3}}$

Step-by-step explanation:

The volume is the space an object occupies. The volume formula for a cylinder is provided and it is:

$V= \pi r^2 h$

Where:

r= radius
h= height

The radius is the distance from the center of the circle to the edge, and it is 4 feet. The height is 8 feet. We are told to use 3 for pi.

r= 4 ft
h= 8 ft
π= 3

Substitute the values into the formula.

$V= (3)(4 \ ft)^2 (8 \ ft)$

Solve the exponent.

(4 ft)²= 4 ft * 4 ft = 16 ft²

$V= (3)(16 \ ft^2)(8 \ ft)$

Multiply the three numbers together.

$V= 48 \ ft^2 (8 \ ft)$

$V= 384 \ ft^3$

The volume of the cylinder is approximately <u>384 cubic feet.</u>

8 0

3 years ago