Bruno bought 96 pounds of sugar for his bakery. Every day he used the same amount of sugar to make bakery items. After 10 days,
1 answer:
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Answer:
D. About 15.69 hours.
Step-by-step explanation:
Let x be the number of hours.
We have been given that there were 2,000 bacteria present at the start of an experiment and the growth rate was 7% per hour.
Since number of bacteria is growing exponentially, so we will use exponential growth function to solve our given problem.
The continuous exponential growth formula is in form: , where,
e= mathematical constant,
k = Growth rate in decimal form.
Let us convert our given rate in decimal form.
Upon substituting our given values we will get exponential function for bacteria growth as: , where, y represents number of bacteria after x hours.
Since we need to figure out the number of hours it will take for there to be 6,000 bacteria, so we will substitute y= 6,000 in our function.
Let us divide both sides of our equation by 2,000.
Let us take natural log of both sides of our equation.
Therefore, it will take about 15.69 hours to be 6,000 bacteria and option D is the correct choice.
Answer:
-30% or 30% decrease
Step-by-step explanation:
What's percentage decrease?
- Percent decrease is the difference between the initial value and new value, indicating a loss of value.
- The formula to find percent decrease is
, where NV = new value and IV = initial value.
How do we solve this problem?
- We know that the original value was $60, so that represents IV. Also, now that the price is $42, it represents NV.
- Now, we plug in the values!
Therefore, the answer is 30% decrease.