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dimaraw [331]
1 year ago
13

The height of a toy rocket that is shot in the air with an upward velocity of 48 feet per second can be modeled by the function

f (x) = negative 15 t squared 48 t, where t is the time in seconds since the rocket was shot and f(t) is the rocket’s height in feet. what is the maximum height the rocket reaches?
Mathematics
1 answer:
777dan777 [17]1 year ago
6 0

The maximum height of an object is the greatest height the object can reach. The maximum height the rocket reaches is 40.2 feet

<h3>Vertex form of an equation</h3>

The maximum height of an object is the greatest height the object can reach. Given the equation that represent the height of the rocket.

f(t) = -15t² + 48t

The maximum height of the rocket occur at the point where:

t = -b/2a
t = -48/2(-15)
t =48/30
t = 1.6secs

Substitute t = 1.6 into the function as shown:

f(1.6) = -15(1.6)² + 48(1.6)

f(1.6) = -38.4 + 76.8

f(1.6) = 40.2

Hence the maximum height the rocket reaches is 40.2 feet

Learn more on maximum height here: brainly.com/question/12446886

#SPJ4

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The distance from Houston to
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Answer:

distance from Houston to Galveston in  kilometers will be: 80km

Step-by-step explanation:

Given

The distance from Houston to  Galveston is about 50 miles.

i.e.

Kilometers in 1 Mile = 1.6 km

As the distance from Houston to  Galveston is about 50 miles, so

The distance from Houston to Galveston in  kilometers will be:

50(1.6) = 80   ∵ Kilometers in 1 Mile = 1.6 km

Therefore,

The distance from Houston to Galveston in  kilometers will be: 80km

8 0
3 years ago
As instructor grades exams, 30%; term paper, 20%; and final exam, 50%. A student had grades of 75,80, and 85, respectively, for
Leni [432]
Okay, so 75 counts for 30% (exams), 80 counts for 20% (term paper), and 85 counts for 50% (final exam)

So you would multiply 30% by 75, 20% by 80, and 50% by 85. That would be 22.5, 16, and 42.5. Add these numbers up, and put them over the total percentage, 100%. So you would have 81/100. The student's final average is 81%.
6 0
3 years ago
Determine and describe the ​number​ and ​type​ of roots of the quadratic functions. Show any and all work necessary to determine
algol13

Answer:

See explanations below

Step-by-step explanation:

The root of a quadratic equation is determined by its discriminant

D = b²-4ac

If D > 0, the roots are real and unique

If D < 0, the roots are complex

If D= 0, the roots are real and equal

a) For the quadratic equation

y=3x^2+7x+8

Since the highest degree of the equation is 2, hence the equation will have 2 roots

From the equation, a = 3,  b = 7 and c = 8

Get the discriminant

D = 7²-4(3)(8)

D = 49 - 96

D = -47

Since the discriminant value is less than 0, hence the roots are complex roots

b) For the quadratic equation

y=2x^2-7x-2

Since the highest degree of the equation is 2, hence the equation will have 2 roots

From the equation, a = 2,  b = -3 and c = -2

Get the discriminant

D = (-3)²-4(2)(-2)

D = 9 + 16

D = 25

Since the discriminant value is greater than 0, hence the roots are real and unique.

c) For the quadratic equation

y=9x^2+30x+25

Since the highest degree of the equation is 2, hence the equation will have 2 roots

From the equation, a = 9,  b = 30 and c = 25

Get the discriminant

D = 30²-4(9)(25)

D = 900 - 900

D = 0

Since the discriminant value is equal to 0, hence the roots are complex real and equal

7 0
3 years ago
A triangle has side lengths of (6v+2) centimeters, (6v+5) centimeters, and (3w-2) centimeters. Which expression represents the p
Slav-nsk [51]
Side lengths of triangle are (6.2v-5.5) cm, (8.5v-6.7) cm, and (6.6w+7.6) cm.
To find:
The expression which represents the perimeter of the given triangle.
Solution:
We know that perimeter of a triangle is the sum of all sides of a triangle.
4 0
2 years ago
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Viktor [21]
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7 0
3 years ago
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