Answer:
True
Step-by-step explanation:
In this question, we are asked to evaluate the validity of a claim whether true or false.
Firstly, let’s understand what is actually meant by prevalence. Prevalence of a disease actually refers to the proportion of individuals who tested positive to the disease. It is simply the proportion of the individuals in a population that has the disease in question.
In this question, we initially had 50 out of the 500, with 40 who didn’t show symptoms at initial testing showed it later.
This 40 is the number of new cases and is a different term entirely. It is referred to as incidence.
Now to calculate the incidence rate, we apply the following;
Mathematically prevalence can be calculated as number of cases/number of population * 100% = 50/500 * 100% = 10%
This makes the claim correct
Answer:
1.25
Step-by-step explanation:
5-4=1
5-3=2
5-4=1
5-5=0
6-5=1
6-5=1
8-5=3
5-4=1
1+2+1+0+1+1+3+1=10
10÷8=1.25
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Answer:
7k
____________________________________________________
Step-by-step explanation:
We are trying to combine like terms with the expression: -k - ( - 8k)
We are pretty much solving it.
Solve:
-k - ( - 8k)
The "- ( -" turns into a plus sign.
So it would look like:
-k - -8k or -k + 8k
Now, you would finish solving
-k + 8k = 7k
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Answer:
Step-by-step explanation:
The area of a trapezium with base 8 top 6 height 4 is 28 cm².
Given that, base of trapezium (b)=8 cm, top of trapezium (a)=6 cm and height of trapezium = 4 cm.
What is the area of a trapezium?
The trapezium is a quadrilateral with pair of sides parallel. The area of a trapezium is the area enclosed within its four sides.
We know that area of a trapezium
Where a and b are parallel sides of a trapezium.
Now, the area of a given trapezium cm²
=14×2=28 cm²
Therefore, the area of a trapezium with base 8 top 6 height 4 is 28 cm².
To learn more about area of a trapezium visit:
brainly.com/question/16904048.
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