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Gnoma [55]
3 years ago
10

A ball, thrown vertically upwards, from the ground, has its height h (in meters) expressed as a function of time t (in seconds),

elapsed after the launch, by the law h(t) = 20t - 5t2. According to this information, determine the height at which the ball is 3 seconds after the throw and the maximum height reached by the ball.
Mathematics
2 answers:
Ivenika [448]3 years ago
6 0

Answer:

pen

Step-by-step explanation:

fddefefgerf

inysia [295]3 years ago
5 0
15 meters and 20 meters
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Dmitry [639]

Step-by-step explanation:

We know that area of Trapezium =

\sf{\dfrac{1}{2} \times (Sum \ of \ its \ Diagonals) \times height}

1/2 * (16+48) * 20

= 640 m²

Now, for semicircle,

1/2 * pi * r²

= 1/2 * 3.14 * 18.86 * 18.86

= 558.44 m²

Adding both,

1198.44 m² ~ 2000 m²

Hope it helps :)

7 0
3 years ago
Read 2 more answers
A high speed train travels at a speed of 300km/h. if the train sets off from a station A at 13 44 and reaches station B at 15 12
Masja [62]

Answer:

See below.

Step-by-step explanation:

The train leaves station A at 13:44 and arrives at station B at 15:12.

Which means the train took 1 hour and 28 minutes to arrive at station B.

The train travels at 300 km/h. It took at least one hour, so the answer > 300 km.

Now, the remaining 28 minutes. We divide them by 60, as there’s 60 minutes in one hour and multiply by 300, as that’s how fast the train travels per hour.

28/60*300 = 140.

300 + 140 = 440.

The distance between the stations is 440 km.

5 0
3 years ago
Find cos b in the triangle
monitta

Answer:

okay I need help please

Step-by-step explanation:

find cos b in the triangle

7 0
3 years ago
A cricket bat is bought for $350.
Luda [366]

15%= .15

.15 × $350= 52.50

$350 - 52.50= $297.50

3 0
3 years ago
If log 3 = A and log 7 = B,<br> find log, 9 in terms of A<br> and B
joja [24]

Answer:

...

Step-by-step explanation:

,,,,,,,,,,,,,

8 0
4 years ago
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