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Sedaia [141]
2 years ago
6

A rocket is launched from the top of a 70 foot cliff with an initial velocity of 130 feet per second. The height, h, of the rock

et after t seconds is given by the equation
h=-161² +130t+70. How long after the rocket is launched will it be 30 feet from the ground?
Mathematics
1 answer:
lana [24]2 years ago
6 0

Answer:

The answer is 7.8 seconds.

  1. Solve for t in the equation using the Quadratic formula.
  2. Eliminate the negative solution and the positive solution is your answer.

Please Mark Brainliest If This Helped!

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In how many ways can a
Tomtit [17]

Answer:

The answer is 364. There are 364 ways of choosing a recorder, a facilitator and a questioner froma club containing 14 members.

This is a Combination problem.  

Combination is a branch of mathematics that deals with the problem relating to the number of iterations which allows one to select a sample of elements which we can term "<em>r</em>" from a collection or a group of distinct objects which we can name "<em>n</em>". The rules here are that replacements are not allowed and sample elements may be chosen in any order.

Step-by-step explanation:

Step I

The formula is given as

C (n,r) = \frac{n}{r} = \frac{n!}{(r!(n-r)!)}

n (objects) = 14

r (sample) = 3

Step 2 - Insert Figures

C (14, 3) = (\frac{14}{3}) = \frac{14!}{(3!(14-3)!)}

= \frac{87178291200}{(6 X 39916800)}

= \frac{87178291200}{239500800}

= 364

Step 3

The total number of ways a recorder, a facilitator and a questioner can be chosen in a club containing 14 members therefore is 364.

Cheers!

6 0
3 years ago
QUICK SOLVE 2y=x+6 show work !!!
marusya05 [52]

Answer:

y=0.5x+3

Step-by-step explanation:

Divide both sides by 2 which will give you y=0.5x+3.

8 0
3 years ago
Read 2 more answers
A. Find three rational numbers between 1/4 and 0.25 repeating
harina [27]
A. 0.250006, 0.250007, 0.250008
b. 0.3330001, 0.3330002, 0.3330003
4 0
3 years ago
Use the elimination method to
IrinaK [193]

Answer:

5x + 3y = 2

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Step-by-step explanation:yes

3 0
3 years ago
76,912 rounded to the nearest ten thousand
natta225 [31]
80,000 is the answer if you have more questions just ask me
5 0
3 years ago
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