<u>Solution and Explanation:</u>
a) 51% of users of mobile phones use their phone at least once per hour,
It is a binomial distribution with n = 150, p = 0.51
mean = np = 150 multiply with 0.51 = 76.5
SD= sqrt(np(1-p) )= 6.1225
Since np and n(1-p) > 5, we can assume the distribution is normal.
B) please see the attached file.
c) It is a binomial distribution with n = 150, p = 0.02
mean = np = 150*0.02 = 3
SD= sqrt(np(1-p) )= 1.71464
Since np < 5, we cannot assume the distribution is normal.
Answer: Yes. AudioCable should buy a new equipment
Explanation:
Audiocables Inc. without new equipment:
Selling price: $1.40
Variable cost: $0.50
Fixed cost: $14,000
Sales: 30000 units
Total cost = Fixed cost + Variable cost
= $14000 + ($0.50 × 30000)
= $14000 + $15000
= $29000
Revenue = Sales × Selling price
= 30000 × $1.40
= $42000
Profit = Revenue - Total Cost
= $42000 - $29000
= $13000
Audiocables Inc. with new equipment:
Selling price: $1.40
Variable cost: $0.60
Fixed cost: $14,000 + $6000 = $20000
Sales: 50000 units
Total cost = Fixed cost + Variable cost
= $20000 + ($0.60 × 50000)
= $20000 + $30000
= $50000
Revenue = Sales × Selling price
= 50000 × $1.40
= $70000
Profit = Revenue - Total Cost
= $70000 - $50000
= $20000
From the calculations made, AudioCable buy a new equipment as profit generated is more.
The descriptions to cases that will possibility be addressed by a Trial Balance are:
- can detect the accuracy of the accounting process(possible)
- can help check whether the debit side is equal to the credit side(possible)
- can help prepare the income statement(possible)
- helps serve as a proof of the application of the double-entry system(not possible)
- can help check whether a particular transaction has been completely omitted(not possible)
<h3>What is trial balance?</h3>
A trial balance can be regarded as bookkeeping worksheet which contains the ledger that is arranged into debit and credit account column .
Therefore, with trial balance, one can check whether the debit side is equal to the credit side.
learn more about trial balance at:brainly.com/question/24217989
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