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3 years ago

True or false 49 is a irratinal number

Mathematics

2 answers:

Vikki [24]3 years ago

7 0

Answer:

false

Step-by-step explanation:

49 is a rational no

brainliest pleazzzz......

Galina-37 [17]3 years ago

7 0

Answer:

False

Hope this helped <3

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If you are 600 m from a batter when you see him hit a ball, how long will you wait to hear the sound of the bat hitting the ball

Molodets [167]

Answer:

The speed of sound at 20°C is 343.42 m/s.

You have to wait 1.75 seconds to hear the sound of the bat hitting the ball

Step-by-step explanation:

Speed of Sound

The speed of sound is not constant with temperature. Generally speaking, the greater the temperature, the greater the speed of sound.

The approximate speed of sound in dry air at temperatures T near 0°C is calculated from:

$\displaystyle v_{\mathrm {s} }=(331.3+0.606\cdot T )~~~\mathrm {m/s}$

The air is at T=20°C, thus the speed of sound is:

$\displaystyle v_{\mathrm {s} }=(331.3+0.606\cdot 20 )~~~\mathrm {m/s}$

$v_{\mathrm {s} }=343.42\ m/s$

The speed of sound at 20°C is 343.42 m/s.

To calculate the time to hear the sound after the batter hits the ball, we use the formula of constant speed motion:

$\displaystyle v=\frac{d}{t}$

Where d is the distance and t is the time. Solving for t:

$\displaystyle t=\frac{d}{v}$

Substituting the values v=343.42 m/s and d=600 m:

$\displaystyle t=\frac{600}{343.42}$

t = 1.75 s

You have to wait 1.75 seconds to hear the sound of the bat hitting the ball

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3 years ago

Solve −15x=6 −30 −65 −1 615

Arte-miy333 [17]

Answer:

its -0.4, are those rlly the options? if they are jus round up and do -1

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3 years ago

Two rectangles are similar. The ratio of the length of rectangle A to the length of rectangle B is 1:4. If the length of rectang

snow_lady [41]

Answer:

Hey have you tried on your own to make sure you understand it?

Step-by-step explanation:

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3 years ago

The science class is taking a field trip. There are a 20 students and a unknown number of adults. The bus holds 35 people at mos

AveGali [126]

It would be 15 because the 35 people at most minus the 20 students equals 15 so that would be the greatest number of adults allowed to be there.

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3 years ago

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Stan a local delivery driver is paid $3.50 per mile driven plus a daily amount of $75. on monday he is assigned a route that is

ozzi

So find the numbers it gives you
3.50$/per mile +75$
30 miles
per means multiply
(3.50*30)+75
105.00+75
he is paid 180.00$ for driving on monday

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4 years ago