2 years ago

Find the area of the trapezoid.

Mathematics

1 answer:

Firlakuza [10]2 years ago

7 0

Answer:

141.12

Step-by-step explanation:

(12.2+10.2)/2*12.6=141.12

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ziro4ka [17]

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Step-by-step explanation:

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2 years ago

Read 2 more answers

2. A pet food company wants to know the number of pets owned by adults ages 21 to 70. The frequency table shows the data from a

ludmilkaskok [199]

Answer:

3.6669

Step-by-step explanation:

Given is a frequency distribution and we are expected to find the mean of the distribution.

Let X be the no of total pets owned and f be the number of adults owning those pets.

Total

x 1 2 3 4 5 6 7

F 248 567 1402 728 419 456 203 4023

x*f 248 1134 4206 2912 2095 2736 1421 14752

Mean 3.666915237

Thus we find the total of all frequencies and then sum of product of x*f.

Mean = sum of f*x/sum of x

Here mean= 3.6669

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2 years ago

Find the length of l on the curve r(t)=5cos(3t)i-5sin(3t)j+3tk over the interval [3,7]

stealth61 [152]

$\mathbf r(t)=5\cos3t\,\mathbf i-5\sin3t\,\mathbf j+3t\,\mathbf k$
$\mathrm d\mathbf r(t)=\mathbf r'(t)\,\mathrm dt=(-15\sin3t\,\mathbf i-15\cos3t\,\mathbf j+3\,\mathbf k)\,\mathrm dt$

$\displaystyle\int_C\mathrm d\mathbf r(t)=\int_{t=3}^{t=7}\|\mathbf r'(t)\,\mathrm dt\|=\int_{t=3}^{t=7}\sqrt{225\sin^23t+225\cos^23t+9}\,\mathrm dt$
$=\displaystyle3\sqrt{26}\int_{t=3}^{t=7}\mathrm dt$
$=12\sqrt{26}$

4 0

3 years ago

Let u=<-5,2>, v=<-2,6>. Find 4u+3v.

charle [14.2K]

Answer:

$\large\boxed{4\vec{u}+3\vec{v}=}$