Consider the following data and then calculate the half-life for this particular isotope:
Time Activity (cpm)
0 days 320,000
40 days 216,100
100 days 120,000
(A) 35.2 days.
(B) 75.6 days.
(C) 70.6 days.
(D) 62.9 days.
(E) None of these.

Answers

Answer 1

Answer:

D. 62.9 days

Explanation:

Half Life Cpm activity:

320,000 / 2 = 160,000

At 100 days cpm is 120,000 then cpm 160,000 will be at 62.9 days.

[320,000 - 216,100] / 40 days = 2,597.5

160,000 / 2,597.5 = 62.9 days.


Related Questions

When Get the Glare Out needed some information about the potential market for its product, the marketing team looked to the Internet to find industry trends and at the market for eyewear products, which uses the same technology that is used in its self-darkening windshield. The type of information the marketing team was using is referred to as Multiple Choice surveys. focus groups. primary data. secondary data.

Answers

Answer:

secondary data.

Explanation:

Market research can be defined as a strategic technique which typically involves the process of identifying, acquiring and analyzing informations about a business. It involves the use of product test, surveys, questionnaire, focus groups, interviews, etc.

Secondary market research can be defined as a method designed to determine the demographics of a particular target market.

A secondary data can be defined as any form of data that has been obtained or collected earlier by someone else through primary sources for their own purpose and made readily available for other researchers to use. Thus, a secondary data is a type of data that has been previously obtained or collected.

In this scenario, the type of information the marketing team was using is referred to as secondary data because it looked to the Internet to find industry trends and at the market for eyewear products, which uses the same technology that is used in manufacturing its self-darkening windshield.

In conclusion, a secondary data is typically reliant or based on the primary source of information and as such it isn't a first hand experience.

Critical Chain Project Management (CCPM) attempts to keep the most highly demanded resource busy on critical chain activities, but not overloaded.

a. True
b. False

Answers

Answer:

True

Explanation:

Critical-Chain

This was introduced or originated by Eli Goldratt in 1997. Its aim is to challenges conventional project management approaches and absolute dependence on TOC principles. The idea of what to change or eliminated is the largely rooted behaviors that is common with the traditional project management practices. It is very multitasking anf it is the longest string of reliance that occur on the project.

Critical- Chain Approach

This approach simply covers project network as it ca be limited by both resource and technical reliance/dependencies. each type of limitations can create task reliance.

The Summary of Critical Chain Approach

1.) use Aggressive but Possible Times (ABPT) for task durations

2.) identify the critical chain by accounting for resource dependencies

3.) use buffer management to track project progress etc.

Market efficiency is probably the most controversial concept in finance. Even recent winners of the Nobel Prize in Economics come down on opposite sides of the issue. Nonetheless, it is important for you to grapple with this idea. It has very important practical implications for investment decisions, including (especially) for your personal investment decision. In particular, should you pursue active or passive strategies

Answers

Answer:

Active strategies should be pursued when the market is more volatile, with larger fluctuations over a shorter period of time, that require a more active management of a portfolio, in order to take advantage of fast changing positions in different assets, and also in order to avoid possible losses due to staying in particular positions for too long.

Passive strategies is more long-term focused, and should be pursued when the economy is more stable. Passive strategies should be analyzed carefully before execution because once the passive investment is made, the idea is to keep the position for a long period of time instead of buying and selling constantly as in a active strategy.

A bond that pays interest semiannually has a price of $941.35 and a semiannual coupon payment of $26.00. If the par value is $1,000, what is the current yield

Answers

Answer:

5.52%

Explanation:

Calculation to determine the current yield

Current yield = ($26.00 × 2)/$941.35

Current yield=$52/$941.35

Current yield= .0552*100

Current yield= 5.52%

Therefore the Current yield is 5.52%

Identify the simplifying assumptions usually made in net present value analysis.

a. AlI cash flows Other than the initial investment occur at the end of periods.
b. All cash flows generated by the investment project are immediately reinvested at a rate of return greater than the discount rate.
c. All cash flows generated by the investment project are immediately reinvested at a rate Of return equal to the discount rate,
d. All cash flows occur at the beginning of the periods,
e. The time value of money is ignored when evaluating investment proposals under the net present value analysis.

Answers

Answer:

a

c

Explanation:

net present value analysis is a capital budgeting method

It is used to analyse the profitability of an investment

what is the primary benefit people receive in exchange for paying premiums to an insurance company

Answers

Answer:

The insurance company will pay for covered expenses

With premium rates from insurance companies, the overall protection is much more guaranteed than a regular, and perhaps the insurance will cover more than regular insurance.

A benefit that people receive in exchange for paying premiums is that insurance company B.will pay for covered expenses.

What is insurance?

The insurance can be regarded as a process of insuring one's property or life in case of danger or any future problems.

The insurance company pays you or someone you choose if something bad happens to you. If you have no insurance and an accident happens, you may be responsible for all related costs.

Therefore, option B is correct because, when people pay their premiums, the company will be available to covered expenses.

Learn more about insurance here,

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If a company can implement cash management systems and save three days by reducing remittance time and one day by increasing disbursement time based on $2,000,000 in average daily remittances and $2,500,000 in average daily disbursements and its return on freed-up funds is 10%, what is the maximum that it should spend on the system

Answers

Answer: $850,000

Explanation:

The maximum amount that'll be spent on the system goes thus:

Additional collections will be:

= $2,000,000 × 3 days

= $6,000,000

Delayed disbursements will be,:

= $2,500,000 × 1 day

= $2,500,000

Then, the increment on funds will be:

= Additional collection + Delayed disbursement

= $6,000,000 + $2,500,000

= $8,500,000

Hence, maximum amount will be:

= 10% × $8,500,000

= $850,000

In a standard cost accounting system, the entry to record purchase of raw materials on account for $13500 when the standard cost is $12620 includes:______.
a. debit to Raw Materials Inventory for 12,750, debit to Materials Price Variance for $750 and credit to Accounts Payable for $13,500.
B. debit to Materials Price Variance for S7S0 and credit to Accounts Payable for $750.
c. debit to Raw Materials Inventory for $13,500 and credit to Accounts Payable of $13,500.
d. debit to Raw Materials Inventory for $12,750 and credit to Accounts Payable of $12,750.

Answers

Answer:

a. Debit to raw material inventory for $12,750, debit to material price variance $750 and credit to account payable for $13,500.

Explanation:

Date  Journal Entry                                   Debit      Credit

         Raw Material Inventory                   $12,750

         Material Price Variance                   $750

               Accounts Payable                                     $13,500

In eight years, when he is discharged from the Air Force, Steve wants to buy a $30,000 power boat. Click here to view Exhibit 12B-1 and Exhibit 12B-2, to determine the appropriate discount factor(s) using tables. Required: What lump-sum amount must Steve invest now to have the $30,000 at the end of eight years if he can invest money at:

Answers

Answer:

The correct answer is:

(1) $15,054

(2) $12,990

Explanation:

The required table is not given in the question. Please find below the attachment of the table.

Given:

Future value,

= $30,000

If discounting rate is 9%, the present value will be:

= [tex]Future \ value\times PV \ factor(9 \ percent, 8 \ years)[/tex]

= [tex]30000\times (\frac{1}{1.09} )^8[/tex]

= [tex]30000\times 0.5018[/tex]

= [tex]15,054[/tex] ($)

If discounting rate is 11%, the present value will be:

= [tex]Future \ value\times PV \ factor(11 \ percent, 8 \ years)[/tex]

= [tex]30000\times (\frac{1}{1.11} )^6[/tex]

= [tex]30000\times 0.433[/tex]

= [tex]12,990[/tex] ($)

A natural monopoly arises whenA. a single firm aggressively forces other competitors to exit and industry.B. a single firm has a monopoly over natural resources.C. two firms merge into a single firm in order to capture more of the market.D. a single firm can produce more cheaply than multiple firms due to a downward-sloping average total cost curve.

Answers

Answer:

D

Explanation:

A monopoly is when there is only one firm operating in an industry. there are usually high barriers to entry of firms. the demand curve is downward sloping. it sets the price for its goods and services.

An example of a monopoly is a utility company

A natural monopoly occurs due to the high start-up costs or a large economies of scale.

Natural monopolies are usually the only company providing a service in a particular region  

Characteristics of natural monopolies

they have a large fixed cost The firms have a low marginal costThey occur naturally through the free market. It does not occur by government regulation or any other force

The specific pace and quota of work and tight surveillance indicate that company 1 has a(n) _______ culture.

Answers

Question options:

-traditional

-contingency

-androgynous

-mechanistic

-organic

Answer:

mechanistic

Explanation:

The mechanistic culture in an organization is one that works by strict rules, structure and guidelines. It is different from the organic culture that is more open and flexible. Mechanistic organizations are characterized by hierarchy and bureaucracy, specifying labour divisions for it's employees in a formal, close-knitted and "mechanistic" approach. mechanistic organizations can be found among older organizations such as universities, hospitals, government organizations etc. Organic organizations can be found among newer organizations such as tech companies.

In a mechanistic culture-based organization, the specific pace, quota of work and tight surveillance are indicator that the company practice such culture.

The mechanistic culture is usually adopted by organization because its works by strict rules, structure and guidelines.

Mechanistic organizations can be found among older organizations such as universities, hospitals, government organizations etc.

In conclusion, the specific pace and quota of work and tight surveillance indicate that company 1 has a mechanistic culture,

Read more about mechanistic culture

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