Valeria tried to evaluate an expression. Here is her work: 8+12÷442 = 8+12÷416 Step 1 = 20÷416 Step 2 = 516 Step 3 = 80 Step 4 Is Valeria's work correct?

Valerie's work is incorrect

Step-by-step explanation:

We solve the above question using the order of PEDMAS

P = Parentheses

E = Exponents

D = Division

M = Multiplication

A = Addition

S = Subtraction

Valeria tried to evaluate an expression. Here is her work:

= 8+12÷416

Let's solve this

From PEDMAS above, Division comes before Addition.

Hence:

Step 1: Division

8 + (12 ÷ 416)

Step 2: Addition

Hence, Valerie's work is incorrect

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

answer:

step-by-step explanation:

here, the total dishes = 10

dishes having meat = 3 ( chicken, meatloaf and hamburger )

thus, the probability of having meat on the chosen dishes = number of dishes having meat / total dishes

=

therefore, the probability of not having meat = 1- the probability of having meat on the chosen dishes

=

=

=

⇒ option b is correct.