Answer:
The correct statement is Aprimenumberarenumberswhichhaveonlytwofactor.
Explanation:
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Answer:
A prime number is one which can be divided only by itself
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The product of the fraction is 8/25. Option C is correct
To multiply these fractions, you can follow these steps:
Multiply the numerators (top numbers) together.
Multiply the denominators (bottom numbers) together.
Here's how it's done:
(4/9) x (1 & 4/5) x (2/5)
Step 1: Multiply the numerators:
(4/9) x (9/5) x (2/5)
Step 2: Multiply the denominators:
(4/9) x (9/5) x (2/5) = (4 x 9 x 2)/(9 x 5 x 5)
Now, calculate the result:
(4 x 9 x 2)/(9 x 5 x 5) = 72/225
To simplify the fraction, find the greatest common divisor (GCD) of 72 and 225, which is 9:
(72 ÷ 9)/(225 ÷ 9) = 8/25
Hence the product of the fraction is 8/25
Learn more on fraction here: brainly.com/question/11562149
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Answer:
Protons and neutrons each count for one AMU, and the electron counts for zero AMU. So, if the atomic mass of oxygen is 16, that means we have a total of 16 protons and neutrons. 16 total protons and neutrons minus 8 protons leaves us with 8 neutrons.
To have 0 charge, the oxygen atom, with 8 electrons and 8 neutrons, must have 8 protons. The 8 protons, each carrying a positive charge, will balance out the negative charges from the 8 electrons and make the atom neutral.
The oxygen atom as described in the question has 8 electrons and 8 neutrons, both electrons with a negative charge and neutrons with no charge. Now, to make the atom neutral or have 0 charge, the positive charges in the atom (from the protons) must cancel out the negative charges (from the electrons). Considering each electron has a charge of -1, there's a total negative charge of -8 coming from the 8 electrons. In order to balance that and bring the total charge to 0, the oxygen atom must have 8 protons. Each proton carries a +1 charge, so 8 protons will carry a +8 charge, which perfectly balances out the -8 charge from the electrons and gives the atom a net charge of 0.
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Every 35 minutes Selma packs 7 boxes, while Trudy packs 5 boxes.
Thus every 35 minutes Selma decreases the difference between them in 2 boxes.
Since the original difference was 6 boxes, Selma needs 3 times 35 minutes, or 105 minutes, in all, to catch Trudy.
Answer- 105 minutes, or 1 hour and 45 minutes.