you throw a ball upward. its height h in feet after t seconds can be modeled by the function h=-16t^2+30t+6.after how many seconds will it hit the ground

Answers

Answer 1

Answer: When the ball hit the ground, the height will be equal to "0".
h=0
Then:

-16t²+30t+6=0

we have to solve this square equation:

t=[-30⁺₋√(900+384)] / (-32)
t=(-30⁺₋√1284)/(-32)
we have two solutions:
t₁=(-30-√1284)/(-32)=2.06
t₂=(-30+√1284)/(-32)=-0.18 This solution is not valid.

Answer: 2.06 seconds.
t

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What is 1/10 of 90000

Answers

The $$\n((1)/(10)) ^(th)$ of 90000 is 9000.

We have a number - 90000

We have to determine $$\n((1)/(10)) ^(th)$ part of this number.

Evaluate 1/5 of 100.

The $$\n((1)/(5)) ^(th)$ part of 100 will be -

$(1)/(5) * 100$ = 20

According to the question, we have -

Number - 90000

Therefore, 1/10 of 90000 will be -

$(1)/(10) * 90000$ = 9000

Hence, $$\n((1)/(10)) ^(th)$ of 90000 is 9000.

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brainly.com/question/683279

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The answer is 9000.............

What is the length of a phone call that would cost the same no matter what company is used?Company A - 0.35cents plus 0.3cents per minute
Company B - 0.45cents plus 0.2cents per minute

Answers

Answer: The length of phone call is 1 minute that would cost the same for both the companies.

Step-by-step explanation:

Since we have given that

Company A - 0.35cents plus 0.3cents per minute

Company B - 0.45cents plus 0.2cents per minute

Let the number of minute be x.

So, our equation for company A would be

$0.35+0.3x$

our equation for company B would be

$0.45+0.2x$

According to question, length of phone call that would cost the same.

so, our equation becomes

$0.35+0.3x=0.45+0.2x\n\n0.3x-0.2x=0.45-0.35\n\n0.1x=0.10\n\nx=(0.10)/(0.1)\n\nx=1$

Hence, the length of phone call is 1 minute that would cost the same for both the companies.

company A- 0.35cents plus 0.3cents per minute.

What is (3x+8) + (6x+2) in simplest form

Answers

$(3x+8) + (6x+2) \n \n 3x + 8 + 6x + 2 \ / \ simplify \n \n (3x + 6x) + 8 + 2 \ / \ gather \ like \ terms \n \n 9x + 8 + 2 \ / \ simplify \n \n 9x + 10 \ / \ simplify \n \n Answer: \fbox {9x + 10}$