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kherson [118]
2 years ago
15

Rachel is going to calculate the following expression: 3.32/1.66+18.4. She calculates the expression as it is written and then w

rites down the answer rounded to the nearest whole number. She then calculates it again, but rounds each of the 3 numbers in the expression to the nearest integer, and then performs the division and addition. She writes this answer down next to the answer she got before. What is the positive difference between the 2 answers she got?
Mathematics
2 answers:
hjlf2 years ago
7 0

Answer:

the answer is 0.5 lol

Ulleksa [173]2 years ago
4 0
0.9
3.32/1.66+18.4 is 20.4
3.32 rounds down to 3
1.66 rounds up to 2
18.4 rounds down to 18
3/2+18 is 19.5
Since they want a positive difference the bigger number goes first
20.4-19.5=0.9
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A cube-shaped water tank having 6 ft side lengths is being filled with water. The bottom is solid metal but the sides of the tan
Mekhanik [1.2K]

Answer:

0.033 ft

Step-by-step explanation:

Let g = 32.2 ft/s2 and h be the maximum height that water can be filled before the sides shatter.

Pressure is distributed from 0 to maximum at the bottom like the following equation:

P = \rho gh

So the force generated by water pressure on the side of the tank is

F = PA = \rho ghs/2

where s = 6ft is the side length of the tank. This force cannot be larger than 200lb

\rho ghs/2 \leq 200

62.4*32.2*h*6/2 \leq 200

h \leq 0.033 ft

4 0
2 years ago
The law of cosines is a2+b2-2abcosC=c2 find the value of 2abcosC
quester [9]
Isolating 2abCos(c) on one side of the equation and using the given values of a, b and c we can find the answer to this question as shown below:

a^{2} + b^{2} -2ab*cos(C)=c^{2}  \\  \\ 
2ab *cos(C)=  a^{2} + b^{2} - c^{2}  \\  \\ 
2ab *cos(C)=2^{2} + 2^{2}- 1^{2} \\  \\ 
2ab*cos(C) = 7
7 0
2 years ago
Read 2 more answers
Perry, maria, and lorna are painting rooms in a college dormitory. working alone, perry can paint a standard room in 3 hours, ma
Leviafan [203]

Answer:Perry and Lorna take the maximum time and Maria and Lorna take the minimum time when they work together.

Explanation: Since, according to the question- Perry takes time when he works alone = 3 hours

Similarly, Maria takes = 2 hours, While Lorna takes= 2 hours 30 minutes or 2.5 hours.

since, there are three people thus their are three possibility to choose any two of them.

1- when Perry and Maria work together then time taken by them is \frac{1}{1/2+1/3}=\frac{1}{5/6}= 6/5= 1 hour 12 minutes.

2- when Maria and Lorna work together then time taken by them is \frac{1}{1/2 + 1/2.5}= 10/9= 1 hours 1/9 minutes ≈ 1 hours 7 min

3- when Perry and Lorna work together then time taken= \frac{1}{1/3+1/2.5}= 15/11= 1 hour 4/11 minutes≈ 1 hours 21 minutes

From the above explanation, it has been proved that when we talk about 2 members team then Perry and Lorna take the maximum time. While Maria and Lorna take the minimum time when they work together.


3 0
2 years ago
Read 2 more answers
Is 7.2 bigger than 7.21
Paraphin [41]

Answer:

yes

Step-by-step explanation:

4 0
2 years ago
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A football quarterback goes for a two-point conversion when the ball is within 10 yards of the end zone. During the game, he has
Crank

Answer:

P=0.075,          P=7.5\%

Step-by-step explanation:

We look for the probability that the player fails the first attempt and also fails the second attempt.

We know that the probability that the quarterback fails the first attempt is:

P(1) = 0.5

We know that the probability that the quarterback fails the second attempt after failing the first is:

P(2|1) = 0.15

Then the probability of failure of both attempts is:

P(2|1)=\frac{P(1\ and\ 2)}{P(1)}

P(1\ and\ 2)=P(1)*P(2|1)

P(1\ and\ 2)=0.5*0.15

P(1\ and\ 2)=0.075

6 0
2 years ago
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