Answer: 7/145
Step-by-step explanation:
The probability that the first student walks to school will be: = 7/30.
The probability of selecting the second student that walks to school will be: = 6/29.
Then we multiply both together and this will be:
= 7/30 × 6/29
= 7/145
Answer:
A
Step-by-step explanation:
You divide the diameter by 2 to get radius. So 5÷2=2.5
So then you multiply 2.5 by pi aka 3.14 so 2.5x3.14=7.85 So we rounds 7.85 to 7.9
69 cm is one standard deviation below the mean
<span>for a normally distributed (bell curve) population </span>
<span>___ about 68% lie within one standard deviation of the mean ___ 34% above and 34% below </span>
<span>in this case , the 34% below the mean is added to the 50% above the mean (the 1/2 of the population equal to or longer than 79 cm) </span>
<span>so 84% of the population is longer than 69 cm</span>
the question says,
the apartment caretaker puts 0.75L of chlorine into the swimming pool daily
the chlorine is sold in containers that holds 4L
so we should get the numbers of containers he should order in 120days.
first of all, lets get the total chlorine needed
total chlorine needed = the chlorine he pours daily X the number of days
total chlorine needed = 0.75 X 120 = 90L
to get the number of containers he should order
= 90/4
= 22.5
therefore the number of containers the he sholuld order in 120 days is 22 and half container.
Answer:
3
Step-by-step explanation:
