5) Entrance to, and exit from, a large departmental store is via one of four sets of doors. The number of customers entering or leaving the store is counted at each set of doors for a period of time with the following results. Set of doors North 327 South 402 East 351 West 380 Number of customres It is claimed that the number of customers using each of the four sets of doors is the same. Investigate the claim.

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Q: W 4. A cell phone company claims that the average time a person spends on their phone is 12.8 hours…

A: Let μ denote the population mean and x⎯⎯ denotes the sample mean. Then, μ=12.8 and x⎯⎯=12.2 Let n be…

Q: Integrate:

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Q: What Is the equation of the graph? Oy= - x O y= 4 x OY=4x

A: Clearly the line is passing through the origin.

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Q: THank you for the assistance, can you please give me step by step explanation and workings

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Q: M 10- B 12 A 13 R perimeter = 28 Y

A: Since you have asked multiple question, we will solve the first 3 question for you as per our guide…

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Q: Calculate the limit algebraically: x³ + 8 lim x→-2 x² + 7x + 10

A: Consider the given expression, If we substitute  in the expression we get  form. so, use L-hospital…

Q: help me please

A: Given  12 + 22 + 32 + ⋅ ⋅ ⋅ + n2 = n(n+1)(2n+1)6Step 1   P(1) is true             P(1) = I2 = 1   ⇒…