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3 years ago

6

One hundred ninety-two students were surveyed about their favorite kind of TV programs. The results are shown in the table. Whic

h kind of program did 25% of the students report as their favorite?

1 answer:

trapecia [35]3 years ago

5 0

Answer:

Music was 25%

Step-by-step explanation:

You might be interested in

Leno4ka [110]

Answer:

$\frac{s^2-25}{(s^2+25)^2}$

Step-by-step explanation:

Let's use the definition of the Laplace transform and the identity given: $\mathcal{L}[t \cos 5t]=(-1)F'(s)$ with $F(s)=\mathcal{L}[\cos 5t]$ .

Now, $F(s)=\int_0 ^{+ \infty}e^{-st}\cos(5t) dt$ . Using integration by parts with u=e^(-st) and dv=cos(5t), we obtain that $F(s)=\frac{1}{5}\sin(5t)e^{-st} |_{0}^{+\infty}+\frac{s}{5}\int_0 ^{+ \infty}e^{-st}\sin(5t) dt=\int_0 ^{+ \infty}e^{-st}\sin(5t) dt$ .

Using integration by parts again with u=e^(-st) and dv=sin(5t), we obtain that

$F(s)=\frac{s}{5}(\frac{-1}{5}\cos(5t)e^{-st} |_{0}^{+\infty}-\frac{s}{5}\int_0 ^{+ \infty}e^{-st}\sin(5t) dt)=\frac{s}{5}(\frac{1}{5}-\frac{s}{5}\int_0^{+ \infty}e^{-st}\sin(5t) dt)=\frac{s}{5}-\frac{s^2}{25}F(s)$ .

Solving for F(s) on the last equation, $F(s)=\frac{s}{s^2+25}$ , then the Laplace transform we were searching is $-F'(s)=\frac{s^2-25}{(s^2+25)^2}$

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3 years ago

Can someone please help me!!! I need help, no links !!!

Sholpan [36]

Give me a few and I will

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3 years ago

The cost of renovating the den is $4.55 per square foot for the carpet and $1450 for a TV. Write an equation to represent the si

7nadin3 [17]

4.5X+1450=C

X represents the amount of square feet
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Can someone please help me with these questions?

tensa zangetsu [6.8K]

Answer:

c and a i think

Step-by-step explanation:

7 0

3 years ago