Four coins are flipped. what is the probability that there will be exactly two heads

The rule below shows how to find the position of an object thrown upward with initial velocity of 15 feet per second. Which answ

nekit [7.7K]

Here we're applying a basic physics rule for vertical motion where the only pull on the object is gravity.

This rule has the form

h(t) = h + v t + (1/2)a*t^2

o o

To adapt this rule to this particular question replace h with 0, as the

o

upward path of the object begins at 0 ft. Replace v with +15 ft/sec.

o

Replace "a" with (-32.2 ft/(sec^2); this is the acceleration due to gravity.

Then we have the following, with the label F(t):

F(t) = 0 + (15 ft/sec)t + (1/2)(-32.2 ft)/(sec^2), or

F(t) = 15t - 16.1t^2. Thus, Choice D is correct.

Please note: To avoid confusion, please use " ^ " to denote exponentiation:

F(t) = -16t^2 + 15t

5 0

3 years ago

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a quadrilateral has vertices A(11,-7), B(9,-4), C(11,-1), and D(13,4). Quadrilateral ABCD is a . If the vertix C(11,-1) were shi

Maurinko [17]

Answer:

A quadrilateral formed by the vertices A(11,-7), B(9,-4), C(11,-1), and D(13,4) forms a rhombus

If the vertex C(11,-1) were shifted to the point C'(11,1), quadrilateral ABC'D would be a kite

Step-by-step explanation:

A quadrilateral formed by the vertices A(11,-7), B(9,-4), C(11,-1), and D(13,4) forms a rhombus. A rhombus is a quadrilateral whose all sides have equal length means it has four equal sides.

If the vertex C(11,-1) were shifted to the point C'(11,1), quadrilateral ABC'D would be a kite because a kite has two pairs of equal sides. A kite is a quadrilateral whose four sides can be grouped into two pairs of equal-length sides which are adjacent to each other....

7 0

2 years ago

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3.25 x 10^4 as an ordinary number

luda_lava [24]

Answer:

32500

Step-by-step explanation:

3.25 x 10^4

3.25 x 10000

Move the decimal point 4 places to the right.

32500

6 0

2 years ago

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You need to buy 8 packages of meat for a cookout. A package of hot dogs costs $2.19 and a package of hamburgers costs $5.89. You

Daniel [21]

Answer:

1.89x + 5.19y = 31.62.

Step-by-step explanation:

Let the pagke of hot dags be x

Let the pakage of hamburgers be y

Now they total up tp 8 packages.

xEliminate the cost

x+y=8

y=8-x

Cost of hotdogs = $1.89

Cost of hamburgers = $5.19

1.89x+5.19y=31.62

1.89x+5.19(8-x)=31.62

1.89x+41.52-5.19=31.62

-3.3x=--9.9

x=3

y=8-3

y=5

3 0

2 years ago

Tom wants to order tickets online so that he and three of his friends can go together to a water park. The cost of the tickets i

vlabodo [156]

Answer:

16n+2.50

Step-by-step explanation:

6 0

3 years ago