It will take 6 weeks for the number of infected people to reach 1200
<h3>How to determine the number of weeks?</h3>
The function is given as:
y equals 15 times 2 to the power of t
Rewrite the function properly as follows
y = 15 * 2^t
When the population is 1200, the equation becomes
15 * 2^t = 1200
Divide both sides by 15
2^t = 80
Take the logarithm of both sides
t * log(2) = log(80)
Divide both sides by log(2)
t = 6.3
Approximate
t = 6
Hence, it will take 6 weeks for the number of infected people to reach 1200
Read more about exponential functions at:
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So let’s sort out the c:
So 6c - c = 5c
Then let’s sort out the d:
4d + 7d = 11d
So the equation simplified is :
5c + 11d
Answer:
3 weeks
Step-by-step explanation:
If St. Augustine grass can grow at a rate of 4 over 7 centimeters per week, then for 12 over 7 centimeters it will take :
12 / 7 centimeters ÷ 4 / 7 centimeters
= 3 weeks
Explanation in words :
If the grass can grow at a rate of 4/7 centimeters per week, and it grows 12/7 centimeters but we don't know how many weeks it took, we just have to divide <em>12</em><em>/</em><em>7</em><em> </em><em>from</em><em> </em><em>4</em><em>/</em><em>7</em><em> </em>to get a result of <em>3.</em><em>.</em><em>.</em>
Let r = radius of the circle.
The circumference is C = 2πr.
The area is A = πr^2.
Because the circumference is greater than the area, therefore
Therefore the radius should satisfy
r < 2