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aleksandr82 [10.1K]
2 years ago
7

A professional stunt performer at a theme park dives off a tower 21 m high into the water. His height above the ground at time t

seconds is given by the equation h= -4.9t^2 + 21.
a) How long does it take to reach the halfway mark?

b) How long does it take to reach the water?

c) Compare the times in (a) and (b). Explain why the time at the bottom is not twice the time at the halfway point.
Mathematics
1 answer:
Alex73 [517]2 years ago
5 0

Answer:

c becauae it is way more resonable

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love history [14]

Answer:

$17.0625

Step-by-step explanation:

9.75 a ticket

As it is 15% every year, in 5 years it would cost 75% more

75% of 9.75 is 7.3125

9.75 + 7.3125 = 17.0625

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What is the answer to this?
konstantin123 [22]

Answer:

\huge\boxed{-6}

Step-by-step explanation:

Since we know the values of a, b, and c, we can substitute them into our expression and get the value.

-2b + | -3c + a |\\\\-2(6) + |-3(-3) + -3 |

A negative multiplied by a negative gets us a positive.

-2(6) + |9 + -3 |

Adding a negative is the same as subtracting a positive.

-2(6) + |9  -3 |\\-2(6) + 6

-2 \cdot 6 = -12\\\\-12+6\\\\-6

Hope this helped!

3 0
3 years ago
Can someone give me advice please..I'm having a panic attack because a car hit my car when i was turning on a yellow arrow and i
rosijanka [135]

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Read 2 more answers
The area of a circle is 706.9 square inches. Find the radius
antoniya [11.8K]

Answer:

15 inches

Step-by-step explanation:

The area of a circle is pi r^2. We basically have to work backwards. I divided it fist by 3.14 which is the value of pi. I got 225.127, but I rounded it to 225. I found the square root of this which is 15. If we check the work. 15^2 is 225, and 225 times pi is 706.9.  

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Solving systems of Equations Word Problems - CLASSWORK
dem82 [27]

Answer:

Part A) For the number of hours less than 5 hours it make more sense to rent a scooter from Rosie's

Part B) For the number of hours greater than 5 hours it make more sense to rent a scooter from Sam's

Part C) Yes, for the number of hours equal to 5 the cost of Sam'scooters is equal to the cost of Rosie's scooters

Part D) The cost is $90

Step-by-step explanation:

Let

x-------> the number of hours (independent variable)

y-----> the total cost of rent scooters (dependent variable)

we know that

Sam's scooters

y=8x+30    

Rosie's scooters

y=10x+20

using a graphing tool

see the attached figure

A. when does it make more sense to rent a scooter from Rosie's? How do you know?

For the number of hours less than 5 hours it make more sense to rent a scooter from Rosie's  (see the attached figure) because the cost in less than Sam' scooters

B. when does it make more sense to rent a scooter from Sam's? How do you know?

For the number of hours greater than 5 hours it make more sense to rent a scooter from Sam's  (see the attached figure) because the cost in less than Rosie' scooters

C. Is there ever a time where it wouldn't matter which store to choose?

Yes, for the number of hours equal to 5 the cost of Sam'scooters is equal to the cost of Rosie's scooters. The cost is $70 (see the graph)

D. If you were renting a scooter from Rosie's, how much would you pay if you were planning on renting for 7 hours?

Rosie's scooters

y=10x+20

For x=7 hours

substitute

y=10(7)+20=90

The cost is $90

4 0
3 years ago
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