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2 years ago

Need help with this word problem!!!!

Mathematics

2 answers:

aev [14]2 years ago

6 0

Answer:

6 seconds after it is launched

Step-by-step explanation:

h(t) = -4t² + 16t + 48

The balloon is at ground level when it lands.

When it is launched, t = 0, and h(0) = 48

When it lands, at time t, h(t) = 0.

-4t² + 16t + 48 = 0

t² - 4t - 12 = 0

(t - 6)(t + 2) = 0

t = 6 or t = -2

The balloon will hit the ground 6 seconds after it is launched.

Crank2 years ago

3 0

Yup it’s 6 seconds!!

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Answer:

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Step-by-step explanation:

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3 years ago

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the radious of each wheel of a car is 16 inches at how many revolutions per minute should a spin balancer be set to balance the

Alex Ar [27]

Answer:

revolutions per minute for 16 inches is 946 / minute

revolutions per minute for 14 inches is 1081 / minute

Step-by-step explanation:

Given data

radius = 16 inch

speed = 90 mph = 90/60 = 1.5 miles/minute = 1.5 × 5280 feet /12 inches = 95040 inches /minute

radius 2 = 14 inches

to find out

revolutions per minute

solution

first we calculate the circumference of the wheel i.e. 2× $\pi$ ×radius

circumference = 2× $\pi$ ×16

circumference = 32 $\pi$

we know that revolution is speed / circumference

revolution = 95040/32 $\pi$

revolution = 945.38 / minute

we have given radius 14 inches than revolution will be i.e.

revolution = speed / circumference

circumference = 2× $\pi$ ×14

circumference = 28 $\pi$

revolution = 95040/ 28 $\pi$

revolution = 1080.43 / minute

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3 years ago

Help me with PART B!!! Use image to help!!

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3 years ago

Mr Grant needs 30 pieces of felt. He can buy them in packs of 10 or as single pieces. What are the different ways Mr Grant can b

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3 years ago

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Which of the following is a solution to the equation "y=3x-1"

nalin [4]

we have

$y=3x-1$

we know that

If the point is an equation solution, it must satisfy the equation.

case a) $(4,1)$

Substitute the values of x and y in the equation

$1=3*4-1$

$1=12-1$

$1\neq11$ -------> the point is not solution of the equation

case b) $(2,5)$

Substitute the values of x and y in the equation

$5=3*2-1$

$5=6-1$

$5=5$ -------> the point is solution of the equation

case c) $(4,3)$

Substitute the values of x and y in the equation

$3=3*4-1$

$3=12-1$

$3\neq11$ -------> the point is not solution of the equation

case d) $(0,-3)$

Substitute the values of x and y in the equation

$-3=3*0-1$

$-3\neq-1$ -------> the point is not solution of the equation

therefore

the answer is

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3 years ago

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