Answer: 30 students per bus
Step-by-step explanation: 99-9=90
90/3=30
30 students per bus
Answer:
the answer is c 4
Step-by-step explanation:
Answer:
150
Step-by-step explanation:
50*1.5=75 75*2=150. Hope your day gets better =)
Answer:
It will take 25.6 years for the mass of the sample to reach 400 grams.
Step-by-step explanation:
Element X is a radioactive isotope such that every 25 years, its mass decreases by half.
This means that the amount of the substance after t years can be modeled by a function in the following format:
In which A(0) is the initial amount.
Initial mass of a sample of Element X is 910 grams.
This means that
So
How long would it be until the mass of the sample reached 400 grams?
This is t for which
So
It will take 25.6 years for the mass of the sample to reach 400 grams.
What is the range? To find the range you take the biggest number subtracted by the smallest number. So 580-28=552 Range=552
What is the median? To find the median you order the numbers least to greatest and cross off the numbers left to right until you get the median aka middle number.
So the median is 130
What is the upper quartile? So the median was 130 so that is the middle quartile, and the numbers above that 187,192,228,301,580 are the upper numbers so find the middle two numbers of those numbers which is 228 and 301 so you add them and divide by 2 and get 264.5 which is the upper quartile
What is the mean? You add all the numbers up and divide by the number of numbers for the mean. So all numbers added up is 2056 then divide by the amount of numbers which is 12, so 2056/12 is 171.3
Hope this helped! Good luck! :)