Answer:
a c and e hope it helps :D
Step-by-step explanation:
3/4 hour
1/12 hour
he has 45 mins to make cards
he can make 1 card in 5 mins
45 divided by 5 is 9
He can make 9 cards in 3/4 of an hour.
Answer:
35,829,630 melodies
Step-by-step explanation:
There are 12 half-steps in an octave and therefore arrangements of 7 notes if there were no stipulations.
Using complimentary counting, subtract the inadmissible arrangements from to get the number of admissible arrangements.
can be any note, giving us 12 options. Whatever note we choose, must match it, yielding . For the remaining two white key notes, and , we have 11 options for each (they can be anything but the note we chose for the black keys).
There are three possible arrangements of white key groups and black key groups that are inadmissible:
White key notes can be different, so a distinct arrangement of them will be considered a distinct melody. With 11 notes to choose from per white key, the number of ways to inadmissibly arrange the white keys is .
Therefore, the number of admissible arrangements is:
Answer:
The mean of the sample was of 7 and the margin of error was of 0.7.
Step-by-step explanation:
Confidence interval concepts:
A confidence interval has two bounds, a lower bound and an upper bound.
A confidence interval is symmetric, which means that the point estimate used is the mid point between these two bounds, that is, the mean of the two bounds.
The margin of error is the subtraction between the bounds divided by 2.
In this question:
Lower bound: 6.3
Upper bound: 7.7
Mean of the sample is the point estimate, so: (6.3+7.7)/2 = 7
Margin of error: (7.7-6.3)/2 = 0.7
The mean of the sample was of 7 and the margin of error was of 0.7.
Answer:
<em> miles,</em>
Step-by-step explanation:
<em>To find out how many miles each person rode, divide the total number by how many people there were. </em>
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<em>Each person rode </em> <em>miles.</em>