35% of 20 = 35/100 × 20 = 7 boys
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The expression log₂(10) tells us when the population reaches 10,000 and the equation 7 = log₂(128) tells us that the population reaches 128,000 in 7 days.
<h3>What is an
exponential function?</h3>
An exponential function is in the form:
y = abˣ
Where a is the initial value of y and b is the multiplication factor.
Let p represent the bacteria population in thousand after d days.
Since each day, the bacteria population grows by a factor of 2, hence:

Hence, d = log₂p represents a logarithmic function
The expression log₂(10) tells us when the population reaches 10,000 and the equation 7 = log₂(128) tells us that the population reaches 128,000 in 7 days.
Find out more on exponential function at: brainly.com/question/12940982
We get that the value of x is option (b) 70.
We are given an equation:
x / 90 = 7 /9.
An equation is an expression that has an equality sign in between.
For example: 2 x + 4 y = 6 or 4 x + 8 y = 9
We have to solve the equation to find the value of x.
First, cross multiplying the numbers, we get that:
x × 9 = 7 × 90.
Now simplifying the expression, we get that:
9 x = 630
Solving the expression to get the value of x:
x = 630 / 9
x = 70.
Therefore, we get that the value of x is option (b) 70.
Learn more about equation here:
brainly.com/question/1214333
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Iiiiiiiiiiiiiiiiiiiiiii need help what's 5/6y=12
Answer:
$300
Step-by-step explanation:
(5000)(2)(3/100)
=300