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Dvinal [7]
3 years ago
10

3. How much time does it take for a bird flying at a speed of 45 kilometers per hour to travel a

Mathematics
1 answer:
Lostsunrise [7]3 years ago
3 0
It will take 20 hours
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2^-1(5)^3(7)^4/2^6(5)^-3(7)^3= (5)^6(7)/2^7
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2 years ago
Is 0.09 more or less than 0.9? same with 0.06 and 0.6.
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.09 is less than 0.9.
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2 years ago
Read 2 more answers
If a ball is thrown in the air with a velocity 52 ft/s, its height in feet t seconds later is given by y = 52t - 16t^2. Find the
Sunny_sXe [5.5K]

Answer:

a.) -20ft/s

b.) -13.6ft/s

c.) -12.8ft/s

d.) -12.16ft/s

e.) -12ft/s

Step-by-step explanation:

Average Velocity = Change in distance/change in time.

Distance from the question in given in form of t as y= 52t - 16t² If our initial time is 2, distance travelled at t=2 is given as

Y(2) = 52(2) - 16(2)² =104 - 64

Y = 40ft.

For question a, when change In t is 0.5 seconds, that is from 2 sec to 2.5 seconds,

Average velocity = y(2.5) - y(2)/0.5

y(2.5) = 52(2.5) - 16(2.5)² =130 - 100 = 30

Y(2) = 40

Average velocity in 0.5 seconds = [30 - 40]/0.5 = -20ft/s.

For question b, when change In t is 0.1 seconds, that is from 2 sec to 2.1 seconds,

Average velocity = y(2.1) - y(2)/0.1

y(2.1) = 52(2.1) - 16(2.1)² =109.2 - 70.56= 38.64

Y(2) = 40,

Average velocity in 0.1 seconds = [38.64 - 40]/0.1 = -13.6ft/s.

For question c, when change In t is 0.05 seconds, that is from 2 sec to 2.05 seconds,

Average velocity = y(2.05) - y(2)/0.05

y(2.05) = 52(2.05) - 16(2.05)² = 106.6 - 67.24 = 39.36

Y(2) = 40

Average velocity in 0.05 seconds = [39.36 - 40]/0.05 = -12.8ft/s.

For question d, when change In t is 0.01 seconds, that is from 2 sec to 2.01 seconds,

Average velocity = y(2.01) - y(2)/0.01

y(2.01) = 52(2.01) - 16(2.01)² = 104.52 -64.6416 = 39.8784

Y(2) = 40

Average velocity in 0.5 seconds = [39.8784 - 40]/0.01 = -12.16ft/s.

Instantaneous velocity at t =2 is derived by getting the first derivative of y and inserting Our value of t=2 into the first derivative.

If y = 52t - 16t², then derivative of y becomes y' given as

y'= 52 - 32t

At t = 2,

y'= 52 - 32(2) = 52 - 64 = - 12ft/s.

Instantaneous velocity at t=2 is given as -12ft/s.

5 0
3 years ago
Each game at an arcade costs $1.50. Chuck spent no more than $12.50 at the arcade. He bought a snack for $5.25 and spent the res
Elodia [21]
4 because $12.50-$5.25=$7.25 you then divide $7.25 by $1.50 which is 4.833333 Therefore the maximum number of games Chuck can play is 4
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3 years ago
Jodi and mariah are sisters. jodi is three years older than mariah. using one variable, write an expression to represent the sum
lapo4ka [179]
Mariah =X
Jodi= X+3

X+X+3= 2X+3
7 0
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