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SSSSS [86.1K]
3 years ago
5

Can i get help ASAP!!! I’ll mark brainliest :)

Mathematics
1 answer:
horrorfan [7]3 years ago
4 0

Answer:

for both?

Step-by-step explanation:


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A researcher wondered whether drivers treat bicycle riders differently when they wear helmets. He rigged his bicycle with an ult
andrew-mc [135]

Answer:

In this case study we have following groups:

1. Population: It had all the cars which passed the bicyclist. Out of which 3000 cars were taken.

2. Who:  Each instance of a car passing a rider, means the drivers passing by.

That is the 3000 cars which passed the researcher on his bicycle.

3. What: The distance at which cars pass the bicycle rider. The distance the drivers stayed away from his bike.

3 0
3 years ago
Hi everyone!!!!!!! how is it going?<br>​
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trash wbu? How's life?

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2 years ago
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If you place a cup of 210 degree Fahrenheit coffee on a table in a room that is 68 degrees fareinheit, and ten minutes later, it
Lana71 [14]
Newton's Law of Cooling

Tf=Ts+(Ti-Ts)e^(-kt)   where Tf is temp at time t, Ts is temp of surroundings, Ti is temp of object/fluid.  So we need to find k first.

200=68+(210-68)e^(-10k)

132=142e^(-10k)

132/142=e^(-10k)

ln(132/142)=-10k

k=-ln(132/142)/10

k≈0.0073  so 

T(t)=68+142e^(-0.0073t)  so how long until it reaches 180°?

180=68+142e^(-0.0073t)

112=142e^(-0.0073t)

112/142=e^(-0.0073t)

ln(112/142)=-0.0073t

t= -ln(112/142)/(0.0073)

t≈32.51 minutes


8 0
3 years ago
49 + (-18) + (-23) = r (r=
fgiga [73]

Answer:

Exact form : r=2squareroot2, -2squareroot2

Decimal form : r=2.8284212...,-2.82842712....

Step-by-step explanation: Take the root of both sides and then solve.

Hope this helps you out.

3 0
3 years ago
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What is nine times for a total loss of 15 3/4 yards
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Try feet /cm or inches 
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