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3 years ago

99 POINTS. WILL MARK BRAINLEST!!!

Mathematics

2 answers:

Korvikt [17]3 years ago

8 0

Answer:

I think you should multiply them, the speed is 25 * 3 = 75 m/s

Tamiku [17]3 years ago

4 0

Answer:

Speed = 75 m/s

Step-by-step explanation:

The formula to find the speed of a wave is found by

Speed = Wavelength x Frequency where the frequency is in HZ and the wavelength is in meters

Speed = 3*25

Speed = 75 m/s

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9. Subtract: 5-3 1/3

Elena-2011 [213]

Answer: 1 and 2/3

Step-by-step explanation:

Imagine 3 1/3 as if it’s in parenthesis as (3 + 1/3)

Subtract three from five.

You should get two.

Then you subtract the last 1/3 from that two.

There are three thirds in one digit.

Therefore, two thirds are left over, plus that last whole digit.

You are left with one and one third.

7 0

3 years ago

If a cone shaped vase can hold 45 cubic centimeter of water and has a radius of 2 centimeters what is the height of the vase use

xz_007 [3.2K]

Answer:

The height of the vase is $h=10.75\ cm$

Step-by-step explanation:

we know that

The volume of a cone is equal to

$V=\frac{1}{3}\pi r^{2} h$

we have

$V=45\ cm^{3}$

$r=2\ cm$

$\pi =3.14$

substitute and solve for h

$45=\frac{1}{3}(3.14)(2)^{2} h$

$135=(3.14)(4)h$

$135=12.56h$

$h=135/12.56$

$h=10.75\ cm$

3 0

3 years ago

Bella rollerblades 8 miles in one hour the function rule that represents this situation is 8x where x is the number of hours nak

mihalych1998 [28]

I hope this helps c:

5 0

3 years ago

Find the balance in the account. $2,500 principal earning 4%, compounded quarterly, after 4 years

Helen [10]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$2500\\ r=rate\to 4\%\to \frac{4}{100}\dotfill &0.04\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{quarterly, thus four} \end{array}\dotfill &4\\ t=years\dotfill &4 \end{cases} \\\\\\ A=2500\left(1+\frac{0.04}{4}\right)^{4\cdot 4}\implies A=2500(1.01)^{16}\implies A\approx 2931.4466123$

3 0

3 years ago

Sebastian measures a line to be 9.2 inches long. if the actual length of the line is 19.5 inches, then what was the percent erro

seraphim [82]

Answer:

47%

Step-by-step explanation:

9.2/19.5=0.47179

the number in the tenth place is 7 and It can´t be changed because 1 isn´t 5 or it also isn´t greater than 5.

4 0

2 years ago