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Marizza181 [45]
3 years ago
12

If each time a student gets a good grade they get points but every bad point can

Mathematics
1 answer:
Olin [163]3 years ago
6 0

Answer:

They get 4 good points!

Step-by-step explanation:

21-17= 4:)

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How many fluorine atoms are found in 1.92 grams of AsF3?
11111nata11111 [884]
First you need to find out how many moles of AsF3 are in 1.92 grams.  
The molar mass of AsF3 is 131.918 g/mole so  
1.92 g * (1 mole)/(131.918g) = .0146 moles AsF3 


 Each mole of AsF3 has 6.02 x10^23 molecules of AsF3 and each molecule of AsF3 has 3 flourines, so you need to convert from moles to molecules AsF3 to atoms of F 
 0.146 moles AsF3 * (6.02 x 10^23 molecules AsF3)/(1 mole AsF3) * (3 atoms F)/(1 molecule AsF3) = 2.64 x 10^22 atoms F
6 0
4 years ago
What is the answer to -3t + 6=0
IceJOKER [234]

Answer:t =-6

Step-by-step explanation:-3t+6=0

3t=6

t=6 dividedby -3

=-2

3t= 3×-2 =-6

7 0
4 years ago
0.0002 in scientific notation
Westkost [7]

Answer:

2 * 10 ^-4

Step-by-step explanation:

We need the first number to be between 1 and less than 10

.0002

2  * 10 ^ exponent

We move the decimal 4 places to the right.  Since we move it to the right the exponent is negative and is the number of places we moved the decimal

2 * 10 ^-4

4 0
4 years ago
convert this rational number into a decimal form:3/7,round to the nearest thousandth,NEED HELP ASAP!!
Hunter-Best [27]
.429 I think is the correct answer, I'm not 100% cure though.
 
8 0
3 years ago
In a certain town, 22% of voters favor the construction of a new hospital. For groups of 21 voters, find the variance for the nu
mixas84 [53]

Answer:

Variance = 3.6 voteres

Step-by-step explanation:

Probability of favour voters, P = 0.22

Total number of voters, n = 21

The probability of voters who are in not favour of new hospital construction = 1  - P

The probability of voters who are in not favour of new hospital construction = 1  - 0.22

The probability of voters who are in not favour of new hospital construction, P* = 0.78

Variance = n x p* x (1 - p*)

Variance = 21 x 0.78 x 0.22

Variance = 3.6 voters

5 0
3 years ago
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