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hammer [34]
3 years ago
11

A ball was thrown upward and its height is modeled by the function h(t) = -4.9t^2 + 58.8t + 98, where h is the height of the bal

l in meter and t is the time in seconds that the ball is in the air. Find the maximum height of the ball to the nearest meter.
Mathematics
2 answers:
Free_Kalibri [48]3 years ago
8 0

Answer:

274 meters

Step-by-step explanation:

The function is a downward parabola.  So the highest point is at the vertex.

t = -b / (2a)

t = -(58.8) / (2 × -4.9)

t = 6

Evaluate the function at that point:

h(6) = -4.9 (6)² + 58.8 (6) + 98

h(6) = 274.4

Rounded to the nearest meter, the maximum height reached is 274 meters.

mr Goodwill [35]3 years ago
5 0
The answer is 15 meters
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A company that offers tubing trips down a river rents tubes for a person to use for $20 and “cooler” tubes to carry food and wat
aivan3 [116]

The group rent 11 river rent tubes and 4 cooler tubes.

Step-by-step explanation:

Rent for river rent tube = $20

Rent for cooler tubes = $12.50

Total spent = $270

Total tubes rented = 15

Let,

x be the number of river rent tube.

y be the number of cooler tubes.

According to given statement;

x+y=15    Eqn 1

20x+12.50y=270    Eqn 2

Multiplying Eqn 1 by 20

20(x+y=15)\\20x+20y=300\ \ \ Eqn\ 3

Subtracting Eqn 2 from Eqn 3

(20x+20y)-(20x+12.50y)=300-270\\20x+20y-20x-12.50y=30\\7.50y=30

Dividing both sides by 7.5

\frac{7.5y}{7.5}=\frac{30}{7.5}\\y=4

Putting y=4 in Eqn 1

x+4=15\\x=15-4\\x=11

The group rent 11 river rent tubes and 4 cooler tubes.

Keywords: linear equations, subtraction

Learn more about linear equations at:

  • brainly.com/question/8520610
  • brainly.com/question/846474

#LearnwithBrainly

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2 years ago
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VashaNatasha [74]

Answer:

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Step-by-step explanation:

it just is

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Temka [501]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
Please help for 10 points and help with both questions please.
DedPeter [7]
Question 21 
Selling price = 18 + 18 x 36/100

Question 22

Discount price = 80 - 80x10/100

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3 years ago
Read 2 more answers
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