Choose the number sentence that illustrates the distributive property of multiplication over addition.
1 answer:
You might be interested in
Answer:
62.9% in ten years
Step-by-step explanation:
This type of growth corresponds to what is called an exponential growth, since in the expression for the number of students keep including the multiplication of the same factor as the years go by, Let's start by analyzing what happens the first year:
The initial enrollment of 750 is expected to grow by 5%, therefore after one year the enrollment should be:
After one year = Year_1 = 750 + 5% increase =
where we have used the decimal form of 5% as he factor 0.05 multiplying 750 (the initial enrollment) to give the increase.
After the second year, we consider a starting value of Year_1 enrollments that will increase another 5%, which gives: Year_2 = Year_1 + Year_1 * 0.05= Year_1 (1 + 0.05).
So replacing Year_1 by its original expression (750(1+0.05)) we notice that Year_2 = 750 * (1+0.05) * (1+0.05) = 750 * (1+0.05)^2
We can go on with this same reasoning and find that each year includes a new factor (1+0.05) to the new increasing enrollment.
At the end of 10 years, the number of enrollment will be:
which we can round to 1222 students enrolled
This means and increase of:
That is approximately 62.9%
For this case, what you should do is follow the steps below.
Step 1:
Cross product for sum of fractions.
Step 2:
Rewrite the expression Adding and subtracting terms from the same grade.
Step 3:
Simplify expression.
Answer
Option 4
See attached image.
Step 1:
Cross product for sum of fractions.
Step 2:
Rewrite the expression Adding and subtracting terms from the same grade.
Step 3:
Simplify expression.
Answer
Option 4
See attached image.