A survey of people regarding their favorite flavor of ice cream shows 60% prefer chocolate ice cream, 30% prefer vanilla, and 10
2 answers:
26 people would prefer vanilla out of 86 people
Step-by-step explanation:
The percentage is calculated by multiplying the quantity with rate of percentage
Given
Total people surveyed = 86
We have to calculate the number of people who prefer vanilla
The percentage of people who prefer vanilla = 30%
So,
Rounding off to the nearest whole number: 26
So,
26 people would prefer vanilla out of 86 people
Keywords: Percentage Percent
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Part A:
The amount of substance left of a radioactive substance with a half life
and amount of initial substance 
is given by
Given that th<span>e isotope samarium-151 has a half-life of around 96.6 years and the rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered.
</span><span>The time since the rock reached its closure temperature is obtained as follows:
Therefore, </span>t<span>he time since the rock reached its closure temperature is 289.8 years.
Part B:
Given that the </span><span>rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered. The number of grams of europium-151 when the rock was discovered is 5 - 0.625 = 4.375</span>
The amount of substance left of a radioactive substance with a half life
Given that th<span>e isotope samarium-151 has a half-life of around 96.6 years and the rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered.
</span><span>The time since the rock reached its closure temperature is obtained as follows:
Therefore, </span>t<span>he time since the rock reached its closure temperature is 289.8 years.
Part B:
Given that the </span><span>rock contains 5 grams of samarium-151 when it reaches its closure temperature, and it contains 0.625 grams when it is discovered. The number of grams of europium-151 when the rock was discovered is 5 - 0.625 = 4.375</span>