The amount of fabric needed for Jimmy's costume is not stated, we can only determine the amount needed for Rob's costume, which makes it impossible to compare the amounts needed for both of their costumes. If this omission was an error, then you can find the difference between these amounts if the amount needed for Jimmy's costume is stated explicitly.
Step-by-step explanation:
The number of yards of fabric needed for Robs costume is (7/8+1/2+1 3/4)÷2
Assuming 1 3/4 is a mixed fraction.
= (7/8 + 1/2 + 7/4) ÷ 2
= (7 + 4 + 2) ÷ (8 × 2)
= 13/16 yards
Suppose 2 yards of fabric is needed for Jimmy's costume, then comparing with Rob's yards, we see that Jimmy's costume requires (2 - 13/16 = 19/16) more yards than Rob's costume.
a. 1
b. 362,880
c. 60,480
d. 84
2. Identify the sampling method.
You want to determine the number of text messages students at your school make in a month. You randomly ask everyone in each of your classes.
Choose one answer.
a. random
b. systematic
c. stratified
d. none of these
Answer:
Step-by-step explanation:
we know that
The complete circle subtends a
so by proportion
Find how many degrees corresponds to of a circle
Answer:
FALSE is the correct answer
Step-by-step explanation:
B 0.5643
C 0.9105
D 0.0233
Answer:
And we want this probability:
And using the normal standard distribution or excel we got:
And the best option would be:
D 0.0233
Step-by-step explanation:
For this case we have the following parameters:
And we select a sample size of n=13. And we want to find this probability:
We can assume that the distribution for this case is normal and then we can use the z score formula given by:
And if we replace the data given we got:
And we want this probability:
And using the normal standard distribution or excel we got:
And the best option would be:
D 0.0233