For this problem, you will have to use PEMDAS (Parentheses) (Exponents) (Multiplication/Division) (Addition/Subtraction)
First of all, you will want to solve for the values inside the parentheses first
40 <span>÷ 1+3-(21)+7-5 Now check for anything that includes multiplication/division and do that
40+3-21+7-5 All you have left now is addition and subtraction. It must go from left to right, therefore if addition is first, do addition, if subtraction is first, then do subtraction.
Final answer = 24</span>
Answer:
Step-by-step explanation: See annex
The figures are in feet
Answer:
And we can find the probability using the normal standard distribution table and with the complement rule we got:
Step-by-step explanation:
For this problem we have the following parameters:
We select a sample size of n =100 and we want to find this probability:
The distribution for the sample mean using the central limit theorem would be given by:
And we can solve this problem with the z score formula given by:
And if we find the z score formula we got:
And we can find the probability using the normal standard distribution table and with the complement rule we got:
Answer:
Andrew purchased 12 pens.
Step-by-step explanation:
First, subtract 5.72 from 20 to get $14.28. Then, divide that by 1.19 to get 12. So, Andrew purchased 12 pens.