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3 years ago

8

How many different ways can a chairperson and an assistant chairperson be selected for a research project if there are 7 scienti

sts available? Which counting method do you use?

1 answer:

alukav5142 [94]3 years ago

3 0

7P2, so 42 ways - permutation method since the order of choosing matters (chair and vice chair)

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if one face of a cube has an area of 6.75 square inches , what is the surface area of the entire cube ?

Travka [436]

Answer:

40.5

Step-by-step explanation:

a cube has 6 faces so 6.75 x 6 = 40.5

3 0

3 years ago

If the if a cylinder is 7 in tall and has a volume of 63 Pi inches what is the area of the cross section it goes right down the

vitfil [10]

Answer: $9\pi \ in.^2$

Step-by-step explanation:

Given

The height of the cylinder is $h=7\ in.$

The volume of the cylinder is $V=63\pi \ in.^3$

The volume of the cylinder is the product of area and height

$\Rightarrow V=\pi r^2h\\$

Insert the values

$\Rightarrow 63\pi =A\times 7\\\\\Rightarrow A=\dfrac{63\pi}{7}\\\\\Rightarrow A=9\pi\ in.^2$

Thus, the area of the cross-section is $9\pi \ in.^2$

7 0

2 years ago

PLEASE HELPP Divide 24 ÷ -3 drag and drop the correct number into the box to complete the sentence

nikklg [1K]

Option A: -8 is the right answer

Step-by-step explanation:

In order to find the quotient of a divided by b is solved as:

$a/ b = a * \frac{1}{b}$

the answer is the quotient

Given

24 ÷ -3

It will be simplified as:

$24 * \frac{1}{-3} = -8$

The quotient is -8

Hence,

Option A: -8 is the right answer

Keywords: Quotient, remainder

Learn more about division at:

#LearnwithBrainly

3 0

3 years ago

A school cafeteria makes cheese sauce for macaroni using 15 cups of swiss cheese 17 cups of cheddar cheese. Perry tries to make

vladimir2022 [97]

Cafeteria ratio of Swiss cheese to cheddar cheese is 15:17.

Perry’s ratio of Swiss chess to cheddar cheese is 5:7.

Wrong ratio because 5 * 3 = 15 but 7 * 3 does not equal 17.

6 0

3 years ago

Read 2 more answers

I am a 3-digit number with 7 in the tens place. My hundreds digit is

Vsevolod [243]

Answer:

170

270

271

371

372

370

470

471

473

472

574

573

572

571

570

675

674

673

672

671

670

776

775

774

773

772

771

770

877

876

875

874

873

872

871

870

978

977

976

975

974

973

972

971

970

Step-by-step explanation:

5 0

2 years ago