Neither of them are correct.
This is what Annabelle is doing:
This is what Navelle is doing:
Navelle is multiplying the exponents. You only do that when you raise an exponent to a power under parenthesis. Annabelle mistook multiplication for addition, and she got her answer as a result. This is the correct way to do it:
Answer:
The percent increase in iron is 50 %.
Step-by-step explanation:
We know that the initial value of iron in a brand of cereal is 1.2 mg of iron per serving and the new value is 1.8 mg of iron per serving.
To find the percentage change in iron you must:
1. Subtract the initial value from the new value:
2. Divide that change by the initial value
3. Convert that to a percentage (by multiplying by 100 and adding a "%" sign)
The percent increase in iron is 50 %.
Answer:
B. (x - 2)(x + 2)
Step-by-step explanation:
The answer is b. If you have (x + a)(x - a), the variables will cancel each other out. For example, if we take the answer (x - 2)(x + 2) and factor it out, we get:
x² - 2x + 2x - 4
Then it becomes just:
x² - 4 because the x to the power of one has been canceled. This proves his theory wrong.
Answer:
Step-by-step explanation:
Binomial probability formula :-
, where P(x) is the probability of getting success in x trials, n is the total number of trials and p is the probability of getting success in each trial.
We assume that the total number of days in a particular year are 365.
Then , the probability for each employee to have birthday on a certain day :
Given : The number of employee in the company = n
Then, the probability there is at least one day in a year when nobody has a birthday is given by :-
Hence, the probability there is at least one day in a year when nobody has a birthday =
Answer:
the scale drawing of the parallelogram is 2 and 5
Step-by-step explanation:
The computation of the scale drawing of the parallelogram is shown below:
For 6 cm length, it is
= 6 × 1 ÷ 3
= 2
And for 15 cm it is
= 15 × 1 ÷ 3
= 5
Hence, the scale drawing of the parallelogram is 2 and 5