Answer:
The greatest common factor is 5.
Step-by-step explanation:
The prime factorisation of 10, 30 and 45 is,
10 = 2 × 5
30 = 2 × 3 × 5
45 = 3 × 3 × 5
The prime factor '5' is common in the factorisation of 10, 30 and 45
So, the greatest common factor of 10, 30 and 45 is 5.
Multiply the area of the circle by the percentage:
60 square units x 50% = 60 x 0.50 = 30
50% 0f the circle id 30 square units.
Answer:
Explanation:
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<u>1. First find the density of your chain</u>
- Volume = displaced water volume
= Volume of Final level of water - initial level of water
= 20 ml - 15 ml = 5 ml
- Density = 66.7g / 5 ml = 13.34 g/ml
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<u>2. Second, write the denisty of the chain as the weighted average of the densities of the other metals:</u>
Mass of gold × density of gold + mass of other metals × density of other metals, all divided by the mass of the chain.
Calling x the amount of gold, then the amount of other metals is 66.7 - x:



Then, there are 26.47 grams of gold in 66.7 grams of chain, which yields a percentage of:
- (26.47 / 66.7) × 100 = 39.7%