When looking at the differences of two means, it is important to identity if the sampling is independent or dependent. Consider the situation below and then answer the question that follows.  In low-speed crash test of five BMW cars, the repair costs were quoted for a factory authorized repair center and an independent repair center. A manager of BMW wants to determine if the independent center has lower repair costs using a hypothesis test. 
Authorized repair center: $797, $571, $904, $1147, $418
Independent repair center: $523, $488, $875, $911, $297

The manager is trying to determine if he should: Afind the mean of the 5 authorized repair center quotes and the mean of the 5 independent repair center quotes and compare the difference of the two means, OR Bfind the mean of the differences of the two quotes for each car.

Which do you think he should choose?​

2 & 7

step-by-step explanation:

he climbs 300 ft/hr at a constant rate. the peak is at 1,500 ft.

when going up, he reaches 600 ft in 2 hours. remember, that he is going in a constant rate. divide 600 with 300:

600/300 = 2

assuming that he takes the same route back (meaning that it's a 1500 ft route back, you can solve.

note also that you are solving when he gets back to 600 ft after he reaches the peak.

first, find the amount of hours it takes to get up the peak. divide the total amount (1500), with the ft/her (300) to get the amount of hours (x):

1500/300 = x

x = 5

it takes jamie 5 hours to get up. now, he is returning down, and reaches 600 (his current destination). remember that he climbs at a constant 300 ft/hr. divide 600 with 300:

600/300 = x

x = 2

now add the two numbers together.

x = 5 + 2 = 7

jamie takes 7 hours to go up the mountain and reach his current position when descending.

(total amount/constant rate) = (time).

remember that it is a constant rate, so in total, when he gets back down the mountain, it will take the same amount of time as when he goes up. the total amount for the round trip is: 5 + 5 = 10.

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1/8 3/16 3/4

step-by-step explanation:

you put them as all the same denominator and multiply

6^2 or 36

step-by-step explanation:

6000n

6×1000n

6×10^3 n

so we need 6n need to be a perfect cube

so n has to be 6^2 so that 6n is 6^3

what i'm saying is if you let n be 6^2 you have 6^3×10^3 or 60^3 which is a perfect cube