hank is working in a silver mine 10ft below the surface. he descends until he reaches a point 57ft below the surface. how many f
1 answer:
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Answer:
45
Step-by-step explanation:
The mean is calculated as
mean =
Given the mean of 8 numbers is 41 , then
= 41 ( multiply both sides by 8 )
sum of 8 numbers = 328
Given the mean of 2 numbers is 29 , then
= 29 ( multiply both sides by 2 )
sum of 2 numbers = 58
The sum of the remaining 6 numbers = 328 - 58 = 270 , so
mean = = 45
The mean of the other 6 numbers = 45
The most reasonable estimate for 90 days is B. 2 × meals.
Explanation:
- The aircraft carrier can serve 1,633,500 meals over a period of 90 days.
- The given values are A. 2 ×
, B.2 ×
, C.2 ×
, D.2 ×
. All the given values are in the range of 2 so it will only logical if we round off the value we have too. We round off 1,633,500 to 2,000,000.
- Suppose you multiply 2 with 100 you get 100, 2 multiplied with 100 is represented by 2 ×
so the power to which 10 is raised represents the number of zeros in the resulting value i.e. 10 is raised to the power of 2 so the resulting answer has 2 zeroes.
- Options C and D have negative powers so they will equal decimal values so only options A and B could be the answer. Since there are 6 zeroes in 2,000,000 which is equal to 2 ×