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Sever21 [200]
2 years ago
11

An article describes a study in which a new type of ointment was applied to forearms of volunteers to study the rates of absorpt

ion into the skin. Eight locations on the forearm were designated for ointment application. The new ointment was applied to four locations, and a control was applied to the other four. How many different choices were there for the four locations to apply the new ointment
Mathematics
1 answer:
Nuetrik [128]2 years ago
3 0

Answer:

There were 70 choices for the four locations to apply the new ointment

Step-by-step explanation:

The order in which the locations are chosen is not important. So we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many different choices were there for the four locations to apply the new ointment

Four locations from a set of 8. So

C_{8,4} = \frac{8!}{4!(8-4)!} = 70

There were 70 choices for the four locations to apply the new ointment

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6 0
3 years ago
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Which of the following is not a tax collected by the federal government?
rodikova [14]

The tax that is not collected by the federal government is \boxed{{\text{excise tax}}}. Option (b) is correct.

Further explanation:

Given:

The options are as follows.

A. Sales tax

B. Excise tax

C. Income tax

D. Payroll tax

Explanation:

The sales tax is a tax that is imposed on the products sold. The sale tax is collected by the federal government.

The excise tax is the tax that is imposed on purchasing the goods .The excise tax is not collected by the federal government.

The tax that is imposed on the salaries of an individual or company is known as the income tax.

The income tax is collected by the federal government.

The tax that is imposed on the employer as the percentage of salaries of employees is known as the payroll tax. The payroll tax is collected by the federal government.

Option (a) is not correct.

Option (b) is correct.

Option (c) is not correct.

Option (d) is not correct.

Hence, the tax that is not collected by the federal government is \boxed{{\text{excise tax}}}. Option (b) is correct.

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Answer details:

Grade: High School

Subject: Mathematics

Chapter: Investment

Keywords: Federal government, tax, sales tax, excise tax, income tax, payroll tax, state government, revenue, local government.

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Answer:

1, 2, -3, 51

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0 ÷ 2 = 0

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-8 ÷ 2 = -4

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100 ÷ 2 = 50

50 + 1 = 51

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3 years ago
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